Malicious PDF — malware analysis report

Static analysis result for SHA-256 42048c6c6cf547c5…

MALICIOUS

PDF

97.2 KB Created: 2021-07-18 20:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4bc9e892d59f3be52343166210e4dc4b SHA-1: 6fec72a0b811aeff3a1d579e9308b0da909c5d6b SHA-256: 42048c6c6cf547c5b3d81c74c62fe0830c556b6eba3b556223fa19f6efffe2c3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that exhibits characteristics of a callback phishing lure, instructing the user to call a phone number for issues related to billing or refunds. Several URLs extracted from the document point to compromised CMS upload storage, suggesting a pattern of hosting malicious content on legitimate but compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f4bc5777583bcd34c95c5336caa4d85a/1283009127.pdf In PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb57f7461a9---zamimijepasabojolijeg.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0834ed0e1---57630491814.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866c9d49517---pomujukodanasiferebejo.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210702203754.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/rho5jquuqukcccm8sj52nlrnq6/18759776062.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a79439c83---52041815529.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210627114731_654329937.pdfIn PDF document text
    • https://semut73.com/contents//files/xutoxunuxav.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210701022927.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a275a8508---bebotajomegosariba.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/54598894908.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/efe33324e5fb786ab676e1372798cf93/96778201413.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/mudemowetobebijarazipem.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/70985915244.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160903ce4504c6---68289077489.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832633ab6b5---22719025288.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/dfj18dcr1p9s2ea2ba5hle4sk6/vefibebosulo.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/jixenifine.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/f5t7bjf8sgcp3365snhg964t3f/jozumovajezituj.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/7ap245c5lq6uj6eb3m21qjdeg1/81400834800.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9b0545f4---mutezibonun.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/nixudoperibilovugodon.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/e9df0d663b86b2263836aa984c5fdccb/99629652186.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/54204895490.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/55547782080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=lee+pro+1000+for+salePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001174d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174D 10188 bytes
SHA-256: 842ec4c2e95aaec6a0200f59bec87960b5858bfd0f397b9e16ec675334539288
font_01_sfnt_off00012e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E45 18620 bytes
SHA-256: 0faa649bace1d8947f681286abcaa55bbcdc13adae448f081e7f044e8d8abcda
font_02_sfnt_off00015f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.