Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d259d953d820586…

MALICIOUS

PDF

68.8 KB Created: 2021-03-16 11:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ae4d5cd1005e1cf1f246eae4350f58ef SHA-1: 8720142671d0ffe3897717093f385998c1721ef2 SHA-256: 1d259d953d8205868fc00dce15162c0f75abd4d53f727eff2fb914425bf6692f
186 Risk Score

Malware Insights

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

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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/strik?utm_term=tom+clancy%2527s+splinter+cell+double+agent+java+game+download PDF link annotation
    • https://nimomobef.weebly.com/uploads/1/3/4/4/134458394/6955714.pdfIn PDF document text
    • http://jagefefixod.22web.org/xajisebozesujowekis.pdfIn PDF document text
    • https://sinemitivivofa.weebly.com/uploads/1/3/0/7/130740142/vevapiwibojot.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/bhfjd4Q/fidukuxofatajobotawaj.pdfIn PDF document text
    • http://tuvijanavodena.22web.org/vezibi.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/slxgegc/turbo_drag_race_scene.pdfIn PDF document text
    • http://inscarusa.info/vaxemuloduzuvovonepugfeje7.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/gijj8lm/trailer_snow_removal_services.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/TpgdJJJ/draw_hills_moto_race_draw_road_game.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/gjZ8B1k/90250182045.pdfIn PDF document text
    • http://freehookup.xyz/braun_series_3_proskin_3080s_manualiafis.pdfIn PDF document text
    • http://onenature.space/pippi_longstocking_bookcf3bm.pdfIn PDF document text
    • http://chatik85939775.fun/23936130557yx9mz.pdfIn PDF document text
    • https://nupinegudoxaxu.weebly.com/uploads/1/3/5/3/135350485/3848656.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/tjbuggE/planet_fitness_membership_cancellation_form.pdfIn PDF document text
    • https://pofunowiri.weebly.com/uploads/1/3/3/9/133997400/jurom.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/xamibebulosaxug/41153653948.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/majegumasusikejuxokab.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/95945189169.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/what_it_says_about_marriage_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/bahubali_2_3_padam_ing.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_off0000cb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 5844 bytes
SHA-256: 307307733d4ebe50ee8841157a1fe58075616c9a7f90bdf3d78dbe0b74043621
font_01_sfnt_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 10556 bytes
SHA-256: 172082d51d530b9686c2cc7d2b610b2bedb0970a657e3290c6ca1a40ab8b1b9d

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