Malicious PDF — malware analysis report

Static analysis result for SHA-256 902e268f2566a1bf…

MALICIOUS

PDF

90.2 KB Created: 2021-07-23 20:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 68fe133ad680fb1f0d7a663a57b9f4b8 SHA-1: ee796f45356822390e32301572db59c05f1f700c SHA-256: 902e268f2566a1bf6157d67ee318fce35bf02817b10346807f11bb500093d217
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm and a callback phishing lure. The document body is heavily obfuscated, but the presence of numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggests an attempt to redirect users to malicious content or phishing sites. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://aljazeerahpetroleum.ae/userfiles/files/15834104116.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f392fea0df---kilojubep.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/2855414349.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/43d77ee1d359c68891fad5c8792ca514/gezowu.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/somerevumajudorogiduril.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/15797644008.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6be6845839c58434b168d307f7dccef4/zawagitubiv.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/70995488041.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6b80d04cf20fd5b4a691948cd6c74aa6/pufuzavetutixaluserakono.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/72983016779.pdfIn PDF document text
    • http://fedoro.ru/upload/file/gadejigijenimuripopukakut.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/lipobofobozuziv.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/0b88aa34aa083ad0c0c6868939dfa75c/74306407118.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/11212286805.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afeb82b98ea---pizabewudoxonowadigimi.pdfIn PDF document text
    • http://svx.su/ffile/file/54690367408.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210621_EA3650098ACC5230.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/40810537849.pdfIn PDF document text
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/gufari.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e787d1aa52---22091239634.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/60654808733.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3c3fdfa74---44751235821.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/81b67c469a3b39df76f097fd44e9d170/72505494896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=400+dpi+to+800+dpi+converter+valorantPDF 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_off0000fd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD06 10716 bytes
SHA-256: 00b31bf126a23cb77e9adb98920e974b5c9cd0e464b3fffceee0a723896bfdba
font_01_sfnt_off000115c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 17148 bytes
SHA-256: 0931016050df5ec9b9b39fc3227f44539a830a10a7966d6c51e30213e8ad034d

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