Malicious PDF — malware analysis report

Static analysis result for SHA-256 80950b5e546a01fd…

MALICIOUS

PDF

81.5 KB Created: 2021-07-05 06:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0c363ddb18a7531360f8a28c36f8c450 SHA-1: af68f9a31196f5bcc740977c17f8667157b635c7 SHA-256: 80950b5e546a01fd8d69fbb699e12fd7b00db714007323a61dbf06cb7acfeb87
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or redirection mechanism. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt the user to call a phone number, a common tactic in tech support scams or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://inwebjor.ru/uplcv?utm_term=sonography+in+kharghar PDF link annotation
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d721091837---10182640098.pdfIn PDF document text
    • https://icbacademy.com/upload/files/93911471030.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c030c89871---72363770937.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/fumifekupufedenajogajavom.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16086a6f94f36b---vipavaritukemosul.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/xatofurisipirafujorodil.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b24cadf1a---49700869889.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a370c847e36---gavoxogelim.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/cajkpmh6kkg152dtr6o5hgp4tc/vefuvidafek.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d79311046abe8a68813cbd16275193c4/67448393020.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726caa457f5---delesewogim.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b890a654c---76185240076.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/250da9d98e4a3002b74009733fa0cdc6/30323392423.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/7730957ecce0cdcb9cbd2b6c4b483db2/velamodat.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/tunevefop.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/7356584083.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0fbc647f807b80bb95ea187fe1991084/91609929792.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/kiwaxerugog.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a4691c705---38608375852.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bef8cae9e0---xosub.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/vevorudonazuvizizodelutuk.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/sofoga.pdfIn PDF document text
    • 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_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 17292 bytes
SHA-256: 7c9fb9f48413680d23a75ef30dde4db526535b2d8f34fa10920cd6a38db2938c
font_02_sfnt_off000121e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E3 10368 bytes
SHA-256: 562229d810f81015a325b34522f5d6d0855360e869678ec19f8b756f4fac1c00

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