Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d7624118af9301…

MALICIOUS

PDF

85.0 KB Created: 2021-07-03 03:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e1ffe22814b0e0ec5a068197917c0ce SHA-1: b620c9ba7e5996984e7efb1977c1ccc8305a5613 SHA-256: 80d7624118af93014327e0757038a5e648fa4101e361eee49bae7ca8e5f88eb7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm and a callback phishing lure, prompting users to call a phone number under the guise of a security or billing issue. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content or initiate fraudulent communication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://beamstraffic.ae/amb/userfiles/file/29846186534.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160780c52a57e4---mivetepuvonuguriketekoro.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddc43c8093---29189298208.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb3bd04e8d---65160493270.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916ffca0eb2---resajer.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608325e8e27e6---9281386398.pdf
    • http://tatnhapkhau.com/ckfinder/userfiles/files/5711826536.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bc70f4216---muxinibafudiwapum.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd6c7e32d9---69413724261.pdf
    • http://4seasonstours.in/userfiles/file/larolosepeputuv.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/qdppqrgl6vfe2la4cd68qdd270/watupo.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/948365cfdecff72e98d971df111caa24/vurogawakanu.pdf
    • https://yepsell.com/userfiles/files/wipejibazo.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/59e7cd2dfc9f50cc4808a49b7588b218/61398437277.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2hop39fib8g55cp70cmo5ek907/42862796737.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160987cef7bf83---85092646889.pdf
    • https://aimhc.com/userfiles/file/40002877693.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a8797f29c3f0c78f0cd8ffdc0f5aa057/mevot.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ae66de6418ca10b6e84437452d1bd9fb/29082003511.pdf
    • http://absolutelyneon.com/userfiles/file/kokujemuvo.pdf
    • https://actaviaserica.org/board/file/files/zeruvetonu.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/67a51a995e624ee922eb6a4cddeee937/lomumotekuf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=exercise+7.5+class+12
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 16792 bytes
font_01_sfnt_off000100c8.bin
f69181f54e183ef5305710412382c8ddef140ddc5632f2e1427d1f505e625014
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 17320 bytes
font_02_sfnt_off00012de2.bin
9cb286a107589d668233f06ab0364c6f887b7dc3885ceda959d513a0a9af5f53
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE2 10408 bytes