Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b8280ec74fd33b…

MALICIOUS

PDF

86.0 KB Created: 2021-09-12 23:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7dc9b121c47e809f66ee896e49afd9f4 SHA-1: 1f5ffa1b8ec46e8db467d05364d31bab972322a4 SHA-256: 60b8280ec74fd33b0c702e30eb12515fd6593b548eae8c4869970e45fcc4d6df
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by multiple heuristics and an ML classifier as malicious, specifically related to phishing and trojan activity. The 'SE_CALLBACK_LURE' heuristic strongly indicates a callback phishing attempt, where the document likely prompts the user to call a fraudulent support number. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to malicious content or initiate a fraudulent interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://straps.by/ckfinder/userfiles/files/52116071724.pdf In PDF document text
    • https://ganganagardentist.com/userfiles/file/29829576710.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69793257832.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/42625735800.pdfIn PDF document text
    • http://rafaelokazakov.com/file/tipibiwanuvapipuzud.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/tinav.pdfIn PDF document text
    • http://aprt1day.ru/file/jagifexenexibirugujozi.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/18822460418.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/bodikovoniwefiwuv.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/nabasesaxoduw.pdfIn PDF document text
    • http://vitrine-prof.com/files/mafevafaden.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/25035062333.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/fajufigebeno.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/lipujumoxobifibup.pdfIn PDF document text
    • https://go2germany.ru/files/file/gefujokudigemegafub.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/milorifolisewixifaxafex.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131d4934ef06---11769059580.pdfIn PDF document text
    • http://gojjang.com/uploads/files/46156534859.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/54164194861.pdfIn PDF document text
    • https://mkontroll.hu/File/23352589816.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/monefoduxanuraja.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/74570485701.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/liwukewipudisige.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/161315a8fe1ad9---xativotifuzel.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/desane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=cool+math+games+tiny+squarePDF 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_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 18276 bytes
SHA-256: 6c99da8df0acd81778d9593a5026503adc075ebe8b103be78b57e95aa6447285
font_01_sfnt_off0001196d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196D 10948 bytes
SHA-256: 60fc24d25116a8aa46ed5d2935e4395bd181ae1f68be26985aa42bf5c54d56b7
font_02_sfnt_off00013261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1