Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec3ac122220b321…

MALICIOUS

PDF

86.8 KB Created: 2021-07-14 05:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 013e21b1a83d5a341a2df38764eacadd SHA-1: 2c6bb7a3537c0058cd5c86dcfe49dc98b6339fe3 SHA-256: 6ec3ac122220b3212cf657ac8abe6bbdef9762367dd07a56747caf1aaf0abe8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the detected threat suggest an attempt to lure users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/psf4sgd2k6jvv7tn0i84dnedm3/giboxe.pdf In PDF document text
    • https://celebicatering.com/upload/ckfinder/files/xarabi.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/fonat.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609daa26ae63d---40696415947.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/25386458511.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/f04tfkhb10v5vga8k9nj4hr1n3/tofumutomovum.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/sazefosunolikofini.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ad1b6edbc---zanelejozegenomuvobifixa.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021043008461184.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2293cb20e---99042728056.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f981eb5a---xupesilafo.pdfIn PDF document text
    • http://palami.by/images/file/56657534549.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a074758ea5c---susoroxukilugebozipopig.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/memudofujifobowowotipelew.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/rudovofeba.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/22b9e22254403853e6572929ef762890/32675189896.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/fafudugomipes.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/pinukinipokofurogurazevi.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862f5440dc7---sapadadose.pdfIn PDF document text
    • http://sam-global.ch/files/file/zodawave.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/jilakunuzegidezakid.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/35412384138.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/67ccda0963c64676d60a9d51ee1aca94/mofogiboraxuz.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0429d2126e128b701c66173d1133de78/4694929482.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ielts+fever+reading+test+55+answersPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 10644 bytes
SHA-256: 846c0b42fecfd7894e6c50ff3cfda708d88d291be6dba869ab7f89f36083bf5c
font_01_sfnt_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 16864 bytes
SHA-256: e44883fb7a4d9fcf61ce055e06a8c927e8c0a7131abca2f8cb00c9bea8ba476f
font_02_sfnt_off000135e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1