Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87df2e9a380ae38…

MALICIOUS

PDF

85.6 KB Created: 2021-07-16 22:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a1e7a890420086d8fc829406b1c50a6c SHA-1: f2b830f3fa0a3fd81795405c8875a385a4ff068b SHA-256: a87df2e9a380ae38a3717e0ba742f9af0c640a1f621233a6af34633ec4d73c38
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b87a2c23bd7---bijexitidolomanenaf.pdf In PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fa0a3b8d1---36184273224.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1dc8441de.pdfIn PDF document text
    • http://honda-vo.com/upload/file/risakanevukegixirobuxuj.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/8av33r7limcbc5iiuj8l99kvg0/vigevenukak.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210505163445577.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/vasakunosobu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c988b72e---4469376683.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/kimojexameronapavef.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/670a49687da6b6b25dc4c8e99da9786e/75742796029.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/84375468427.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/097cc5d7930ec9dc8666aacc205a29a7/kimikedetisaviginoxix.pdfIn PDF document text
    • http://meadspool.com/clients/8/8e/8e46726fd42f39913d2349bbdb4e70c4/File/jodudagidenozadu.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/xizuf.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/tuxepa.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/paziluxafezetiluwu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1edb53932---80315063817.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/41710549857.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16095e32d5cfcb---90238883417.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cf1c87cfb---refiderubukogirimiguta.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608669fc69010---ratufu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d54d0d2fb8fa4a3cbdef53786610ad55/peterozazaxidik.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/vofapelewogobofoladasowu.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/44027906637.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/63339495585.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=surface+chemistry+jee+mains+notesPDF 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_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 10976 bytes
SHA-256: 7483711264c0687512adebc779d2917408eacd3e30487aa35b40a23823ca052b
font_02_sfnt_off00011b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B38 17436 bytes
SHA-256: e6f5db15609f385233d47b314bd8e60d0a6721ceac148794887609cced2c0ba8

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