Malicious PDF — malware analysis report

Static analysis result for SHA-256 6127a269bb753ed6…

MALICIOUS

PDF

72.5 KB Created: 2021-02-23 04:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4eb44b44d9cdc4ac06be559384e85c16 SHA-1: b7600edcbc96c9ded21e343aeb9b58a5d3ec3ffd SHA-256: 6127a269bb753ed64fb998798f5fc4b1f3193bc98c7989b27cb469cac0f57323
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://bologen.ru/aws?utm_term=how+to+remove+a+delta+monitor+bathtub+faucet PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/bhjihgh/xiwofigu.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/tupez.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/ifnO9gj/vujovimozulamom.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/iaQ7cif/84052603273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495395/normal_5fc8ec4718b56.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/qsjjbjg/bullet_boy_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392457/normal_6006118c18cec.pdfIn PDF document text
    • https://jakigirizog.weebly.com/uploads/1/3/1/4/131453624/mebarikifof.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/saludug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_6014d553eeec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_602da53190d5b.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/9053711.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/abe776699cb66f.pdfIn PDF document text
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/6642e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_5fe849be6d6b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voruluju.epizy.com/2571914483.pdfIn PDF document text
    • http://safubifulaxoxe.rf.gd/zte_mobile_hotspot.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/ibn_arabi_quotes.pdfIn PDF document text
    • http://mesuwirafifi.rf.gd/56962257468.pdfIn PDF document text
    • http://zowomazo.epizy.com/20203819401.pdfIn PDF document text
    • http://dodujis.epizy.com/ribaxitaz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDB 5336 bytes
SHA-256: 46f740211f58cf0d44518deec29027e9e6e30159ad11e8e38668ca37d249c20e
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 11356 bytes
SHA-256: 707fd81212cadfbcabedd82172b1b59d3ca2682a595586a46d527d0410916562

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