Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6538164a22ea3c6…

MALICIOUS

PDF

93.2 KB Created: 2021-03-03 09:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bfa1dda72b90d1a49f8944cc9fa407ad SHA-1: 9d93b024fd5fa87f20caeae9560df579ee1e2ccc SHA-256: e6538164a22ea3c6e820fadca404b31dfdea9feb07c15ffe62a3947f4da735e2
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detection and ML classification strongly suggest malicious intent, likely to distribute further malware or phishing content. The presence of embedded JavaScript, though not directly analyzed for specific actions, is a common vector for exploiting PDF vulnerabilities or initiating malicious downloads.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=cyberpunk+2020+manuale+ita PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454971/normal_603dc43b7c7c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380211/normal_60026f5e8291f.pdfIn PDF document text
    • http://meetcabinets.xyz/vopanetizotavugox5hlo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_602e369773a69.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/heehahg/bottlekeeper_discount_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/nivuduful/LKQij03/nodig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_6027a47edfa40.pdfIn PDF document text
    • https://zubowosusotikip.weebly.com/uploads/1/3/1/6/131637009/sorasajesu_venapaluzen_lasivariso.pdfIn PDF document text
    • https://gakikodokuni.weebly.com/uploads/1/3/1/8/131857060/lemufaxaxep.pdfIn PDF document text
    • http://rating-bookmaker.ru/how_much_does_a_motherboard_cost_uk2rkan.pdfIn PDF document text
    • https://gufekesunix.weebly.com/uploads/1/3/4/8/134888283/tubobima_vumogogixera_zaginabod.pdfIn PDF document text
    • https://javexediwoxi.weebly.com/uploads/1/3/4/5/134584379/ecfc96151.pdfIn PDF document text
    • http://liolika-rsya.ru/manual_del_ingeniero_industrial_maynard_5_edicionvoz7h.pdfIn PDF document text
    • http://ludshop.xyz/67953758932k3ime.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/5117307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_603cc5edddad6.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/617433.pdfIn PDF document text
    • http://sberbank.link/68751243439l1csy.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/2891583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_601029dba2130.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00013109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13109 5272 bytes
SHA-256: f90b94fa416dac508dea16c7282649f43574cb2c2866f4b098afbc585c5082b0
font_01_sfnt_off000142e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E7 10960 bytes
SHA-256: d525f94227bf45a5aa181795b1c4d4e335d8ec997d5bf7cc5128185c5789fc43