Malicious PDF — malware analysis report

Static analysis result for SHA-256 264bd81ee9ce60f2…

MALICIOUS

PDF

95.5 KB Created: 2021-08-10 02:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bde6e9e8655e1af1931e908138a8e6c1 SHA-1: 17dee6d29e4a5b70665a23d31563474e86fd953c SHA-256: 264bd81ee9ce60f2942eff784993e1ffe5254816b193e07df4383d9146bf9a2e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to prompt users to call a phone number, a common tactic in tech-support scams and callback phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://garmagostaran.com/Upload/file/2290706734.pdf In PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/746ef67bcc5097cdd6311b9b62067462/83796875958.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/rolibomowuvajakedulilumib.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/nefupo.pdfIn PDF document text
    • http://mitra.su/uploads/ckeditor/files/69645867134.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/ppv92nh8bncrkaln4trluas459/15855117661.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6031253e7---fetanesox.pdfIn PDF document text
    • https://ntc-container.com/upload/files/notagawumim.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f59ac5b852---51194733869.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/47149848873.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e76c821ed96---beruduzerutimenedike.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/9072bb343bde4d8920ff6f75d7c8900d/gurefolavaduzowumopiwavi.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/62910844561.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a77273684bc---821892162.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/f6e49bfffec14e4dd948601c278099f3.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/solofet.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbee491984---xululotejakurarumozet.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/016f0e46c624fa4501d4498282a61f78/tizisujazexe.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072db5aa2115---seganazilut.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/pls9vnaan5du5pk6hkn60afa2f/55336256621.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/d9e9860479437dbfe7313c622e9701b6/77759153291.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/kenig.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/7016613474.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/napadi.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/kebawijibemijexukebukixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+unlock+a+tracfone+to+any+carrierPDF 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_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 18184 bytes
SHA-256: e55376ae468be904a2e0e27df52d579251f58bb4ff0163fa4384fb437ea9f62f
font_01_sfnt_off00013eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAF 10544 bytes
SHA-256: e16567a8ae3a6981f7b68c69739cbebb7eae893c8e55453f0b3aa21193179c91
font_02_sfnt_off000156e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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