Malicious PDF — malware analysis report

Static analysis result for SHA-256 e778897a1a4d3f9f…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 00:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6f3da95e80bb702e36e8fe0b7843ee97 SHA-1: cbf07979dab77c3f877016d92329ad018fa568f0 SHA-256: e778897a1a4d3f9ffbf5eb168bcc323e26063fe982c7ba5be232c01e46133601
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bensonlandscape.com/editorData/file/47584907187.pdf In PDF document text
    • https://uniontend.com/userfiles/files/72455663596.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/6728663f72c17788c98b240f0f4f352c/mogutozam.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dea57b8dd---vurepoxodazegupibis.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/lk5dr5go9h3qaie7ecv6apf2o1/73495110285.pdfIn PDF document text
    • https://chp-travel.ir/data/file/roletafovukolu.pdfIn PDF document text
    • http://indel.sk/userfiles/file/diwem.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/85075275097.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/gbl2m9gvtql9u8kcsnia2e5jtc/tolodij.pdfIn PDF document text
    • http://abc-tel.ru/data/File/24828714804.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a81827cfb6---dagax.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1c42d503---kimin.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3699a67e8f---xavuzatox.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-4/20210504090521123197.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/de8a6df0ddcbb0546c2c44e359113083/87019412989.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/rrfjhcqu9bhc5s3m6m64i4d421/jivarakafaj.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609654fcd686b---nasijilu.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/346b5f55c819b021a35cbd60962c2e26/kiwoturovuvip.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0ba77929b782b6236576a286749aa6e1/fukisilir.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ffcm357qlndg1b9pk7ju4robc1/kelujigesuwojazute.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/jk20e1nu8c15ga130iop7mse3s/wugekagonumimamodupid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=trivia+questions+and+answers+australiaPDF 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_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 17596 bytes
SHA-256: 29445529eaf9af247ed2342f71a17296638bc64957193a5f21b3c23d7e3df557
font_02_sfnt_off000136c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C8 10600 bytes
SHA-256: c7a1db2f2af6efe12401e13035ad6751d42ab46d0b0c8385e3228c912c37398f