Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aee1ddec94c3834…

MALICIOUS

PDF

78.4 KB Created: 2020-12-31 18:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 034b791e3a75b65e9908ba6f120a4315 SHA-1: bd27168ae6b685b672543a105e2b03dd815f0758 SHA-256: 6aee1ddec94c383494a434c2e1d73c501f8039e478d7618077b1904dd715c3ae
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafffi.ru/strik?utm_term=ghosts+of+mars+2+imdb PDF link annotation
    • https://monazixoniju.weebly.com/uploads/1/3/4/6/134694361/4870aecc437d764.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/gapelapuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesumor/jfjiXgi/71918118666.pdfIn PDF document text
    • https://jajujawu.weebly.com/uploads/1/3/0/8/130813132/7415960.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/fc04842a7bc669f.pdfIn PDF document text
    • https://bitabado.weebly.com/uploads/1/3/1/4/131436956/tagux.pdfIn PDF document text
    • https://lopodudox.weebly.com/uploads/1/3/4/3/134339354/9907568.pdfIn PDF document text
    • https://benukakaruw.weebly.com/uploads/1/3/4/7/134745121/fumeturazipav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fc58638b13dd.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/sozomam-sonewutigut-dotaganol.pdfIn PDF document text
    • https://cdn.sqhk.co/pevukoza/jfKIphc/72889078227.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farezelof/sticks_game_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/teaching_phonics_in_context.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/informational_text_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/juvegipebugirafo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/waste_management_in_egypt.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_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 5416 bytes
SHA-256: b64ded563da7d342e56c2ebc7c69d5ec350a6f7cce407143187f99228f122ab1
font_01_sfnt_off000104ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 12056 bytes
SHA-256: 5e7b9925f41eb12bf04e480d784b0e7ae9b802928eb6a043237182d379dd787f