Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafe94dce2dc0e79…

MALICIOUS

PDF

85.8 KB Created: 2021-07-26 14:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 0fb3bf7853a284d989a4cb42d5b37fb6 SHA-1: d74a34d9adfaa0c18e7f5a3822055cedbc721b76 SHA-256: cafe94dce2dc0e79d1d070c17e168f37da3af614331ea3841ab6de2f837ec818
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to compromised WordPress upload directories, suggesting it is part of a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document prompts the user to call a phone number, a common tactic in phishing and tech-support scams. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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) 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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0b38c56b9---9712064532.pdf In PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/06d184f4ac2cc867bdf5230bcae90dfe/40050039440.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/10201296b1d602f09bd1ba8b41f43f7e/82570226049.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c110ed6d79---98980677156.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ef64f9ee---21807341288.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160dbba34e8b56---56389275736.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/gotagibupa.pdfIn PDF document text
    • http://aquatherm-graz.at/files/78678504083.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/2819629450.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/43001671693.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/tumujeba.pdfIn PDF document text
    • https://actor-conseil.com/files/file/rapazorizagapuvokig.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d58eb88a---rimumuzefexojomufowelolar.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ffb0adc3c---fitetizexulibul.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/zugulikekor.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b64decba9bc---18872334346.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db44405c95---busug.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa62948692e---58456719662.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/kivatewosutakovumufikobes.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/rajafosofajosubirojogipu.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/18975647611.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/bdqltal01u61bl98onmnqfgr7o/34846411183.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/39729191241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=forward+financial+bank+loginPDF 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_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 16728 bytes
SHA-256: 411341bb098948f945aa981d1cdcdee2c609a15c438ce6fb15b3f3071a21c4ed
font_01_sfnt_off000117ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EE 10548 bytes
SHA-256: 210ad27a7ca4ca9e33b177fd2dbca10243ca7d35881f59cd0fd0174f43e81adf
font_02_sfnt_off00012fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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