Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67b86dedd582b9c…

MALICIOUS

PDF

80.7 KB Created: 2021-03-21 04:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5e20728e5cb79ab371842c7ebf6d6329 SHA-1: 8d3bde7c14c7da2e1ddf2753dd87a2e61efb1828 SHA-256: f67b86dedd582b9cb129be29487b23d1c6aaba2ad53f667eb2f54afa9e645cc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://pelibifir.ru/123?utm_term=bravia+android+tv+apps PDF link annotation
    • https://cdn.sqhk.co/vivutazawi/qdig6aN/wingstop_nutrition_facts_original_hot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_5fea149cc0102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449599/normal_6030834fd0c99.pdfIn PDF document text
    • https://fuluposusiziz.weebly.com/uploads/1/3/5/3/135321682/1139750.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/UjcVhf1/20156569033.pdfIn PDF document text
    • https://wejatinolu.weebly.com/uploads/1/3/1/4/131438249/kefababebexuzegaseni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403262/normal_5fce966024020.pdfIn PDF document text
    • https://cdn.sqhk.co/potekovibe/gc5mjdw/48092963216.pdfIn PDF document text
    • https://petenugilamabo.weebly.com/uploads/1/3/1/4/131453278/zuvaxajizefofutuwure.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/gjiA6he/carnival_game_toss_ball.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/iaiXJt1/botapileg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zogojazaje.rf.gd/halloween_worksheets_for_second_grade.pdfIn PDF document text
    • http://fotoximavibadiz.rf.gd/notagumudo.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/centric_rotors_application_guide.pdfIn PDF document text
    • http://tujulerika.epizy.com/neninunojerenoduditux.pdfIn PDF document text
    • http://fezipowivi.rf.gd/vobagiwot.pdfIn PDF document text
    • http://simitilukurisat.rf.gd/how_to_find_number_of_periods_in_compound_interest.pdfIn PDF document text
    • http://suvumudupese.epizy.com/98205490612.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/aurender_s10_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/barbie_dolls_ki_video.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 4700 bytes
SHA-256: 35edcc7f2be2ebe83e356c7fa83089a8fd4c2a471a0e1f487c00838d1d4ab8ee
font_01_sfnt_off000102ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 10752 bytes
SHA-256: e9accb4afa86f60f69a4fb55c87c20120f4cf1ce0e6eeb792ec3b65afe50a71d
font_02_sfnt_off00012778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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