Malicious PDF — malware analysis report

Static analysis result for SHA-256 271fcfc1ad4c89e3…

MALICIOUS

PDF

97.8 KB Created: 2020-11-11 23:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 29a04410a81b2762ae3fb846c337a434 SHA-1: df5d013eb1f9d7053d85f77bc7b0fe027cc5120f SHA-256: 271fcfc1ad4c89e3c069341779ce4a160abe41a28bfbeeeb766300803ba977f1
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 0.9998

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=and+then+there+were+none+book+pdf PDF link annotation
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/fizuderoledapew-mavisilu.pdfIn PDF document text
    • https://wojegapemepuwa.weebly.com/uploads/1/3/4/0/134096127/rilofutit.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/dufurifezowa-tedozafojo-katowisasanuja-dakikipuku.pdfIn PDF document text
    • https://fozokixudaxo.weebly.com/uploads/1/3/4/3/134355354/0c56c68882960d.pdfIn PDF document text
    • https://xibopenevitamog.weebly.com/uploads/1/3/4/4/134488628/3d566c32eac2e0.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/16e466f656.pdfIn PDF document text
    • https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/9394713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_5fa26e61d1e8a.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/679721.pdfIn PDF document text
    • https://jozipomona.weebly.com/uploads/1/3/4/4/134479443/tulezetoxomow_xusukone_dutemaj_luzizalibepi.pdfIn PDF document text
    • https://sarixibaparuve.weebly.com/uploads/1/3/4/3/134382026/muvijivawomo.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/5045053.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
    • https://s3.amazonaws.com/gedimuta/26028193973.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/sagobikuxazixizorakabug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA5 4732 bytes
SHA-256: fbda3ee71d978b4a54251eed53bce3a538d4228864d57cf91563eef1222a5040
font_01_sfnt_off00013fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAD 14236 bytes
SHA-256: aa1a849a90fd8625e767c3f1825c4cb3c9c32fedf92c382c7294930b0c284b72
font_02_sfnt_off00016bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BFF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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