Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadac7875c97399f…

MALICIOUS

PDF

70.2 KB Created: 2021-05-28 14:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 07825b1d48b7f1b68ea2d60da3f06ef9 SHA-1: d6a10c0873917fa1ac6afa84a8548b6bea7d9ddb SHA-256: eadac7875c97399fbfebb14f554849627cbdf55299101089fcca423e02adc499
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://lozipotod.ru/strik?utm_term=5000+circuitos+integrados+pdf+de+amplificadores PDF link annotation
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/9198984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417817/normal_600dde6c44693.pdfIn PDF document text
    • https://karujelibofab.weebly.com/uploads/1/3/1/4/131406149/2e34c.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/jiwisujug.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/960861.pdfIn PDF document text
    • https://tofejigijo.weebly.com/uploads/1/3/4/3/134312142/mememajizil.pdfIn PDF document text
    • https://rediwikutine.weebly.com/uploads/1/3/4/0/134096605/607811.pdfIn PDF document text
    • https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/nusunavezukofef-kesuki-fisepusok.pdfIn PDF document text
    • https://kefuluseze.weebly.com/uploads/1/3/1/3/131398598/3175732.pdfIn PDF document text
    • https://ginimowawogob.weebly.com/uploads/1/3/4/7/134753870/c08783e2a.pdfIn PDF document text
    • https://dusimajigedavim.weebly.com/uploads/1/3/1/4/131453199/jumomatawomoxez_ruzed_pezixisuri.pdfIn PDF document text
    • https://nimudizovif.weebly.com/uploads/1/3/4/4/134478886/kasew-tabubipudasiga-lafaripigajelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_6064594cc397a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501509/normal_6017b2cda9382.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418180/normal_5ff52946b8439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_605b7a39b6f6f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379231/normal_60afe5c35bac9.pdfIn PDF document text
    • https://mejepizejuv.weebly.com/uploads/1/3/4/5/134528376/bulawigedifixof_texenifib_nupuratotal_zijuvef.pdfIn PDF document text
    • https://fezekisovo.weebly.com/uploads/1/3/4/6/134661064/a18af670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_603e4b077116d.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_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 5644 bytes
SHA-256: 5795f1642f9cd53609ed59094c6e3f1553e7ee612cc6198071c37613c1b8b4c1
font_01_sfnt_off0000e2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AC 12528 bytes
SHA-256: c0f857d75ecfb4b3ffa93dca115796873ccd77168c7a87d4f6e0329b013d9596

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