Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dd106066b46f08…

MALICIOUS

PDF

82.4 KB Created: 2021-01-18 14:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9ded40b5b2fcda7535447a34935eb406 SHA-1: 11572e29d5f62e8dd436490df3edc28245734df0 SHA-256: e4dd106066b46f088ab58b197546dbd636acd9328c67489d4537f97fa2a15ad2
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ClamAV and a machine learning classifier, indicating a high probability of malicious intent. It impersonates Facebook to trick users into clicking a link, likely leading to credential phishing. The document also contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to distribute malicious content or traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/8531812.pdf.
  • 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.
  • 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://seumenha.ru/123?utm_term=world+series+of+poker+hack+no+human+verification PDF link annotation
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/8531812.pdfIn PDF document text
    • http://najitop.22web.org/descargar_the_catapult_2_hack_apk.pdfIn PDF document text
    • https://kulipimeg.weebly.com/uploads/1/3/2/6/132695915/210a834f78ada5.pdfIn PDF document text
    • https://zefukigu.weebly.com/uploads/1/3/4/7/134718507/gixit.pdfIn PDF document text
    • https://subutadenurafo.weebly.com/uploads/1/3/4/5/134581349/jogakaj.pdfIn PDF document text
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/8559259.pdfIn PDF document text
    • http://naropiwazufilu.22web.org/6425237901.pdfIn PDF document text
    • https://tipiridevozono.weebly.com/uploads/1/3/4/3/134349557/b75796.pdfIn PDF document text
    • https://moxuzoketo.weebly.com/uploads/1/3/1/1/131164531/ranip.pdfIn PDF document text
    • http://jomotew.iblogger.org/hydrocarbon_combustion_worksheet.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/zolowuxodotusuv.pdfIn PDF document text
    • https://fatofexar.weebly.com/uploads/1/3/4/6/134687548/8612145602943c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakitidopapav.epizy.com/dozofiduranurax.pdfIn PDF document text
    • http://pavasokunise.epizy.com/admission_form_aiou_continue_students.pdfIn PDF document text
    • http://robowogutalopet.epizy.com/xiaomi_mi_a2_lite_android_10.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/dcms_annual_report_2018.pdfIn PDF document text
    • http://nolixegoxow.epizy.com/christmas_carol_dickens_italiano.pdfIn PDF document text
    • http://negavutagogo.epizy.com/007_blood_stone_pc_portugues.pdfIn PDF document text
    • http://gusubozavagu.epizy.com/61604686631.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 5532 bytes
SHA-256: 20d44eb0e3196e00e1caadf46bf94667ddc94a3e072a20a48300cb71e64976e7
font_01_sfnt_off000115ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EA 11192 bytes
SHA-256: 62c28166d90eb1bf01b663d03c7263cd35d083b7e445a762932da630fa236c7d