Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6429d3680434c8…

MALICIOUS

PDF

76.2 KB Created: 2021-04-02 18:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: feeed1d9e36ee551793675ebcb01b1f3 SHA-1: 73c4bcecb23e8a59d46cc59f54accd275705158b SHA-256: 6b6429d3680434c841ed175796f72746a2c49529b4cf2f5bd08d03700c5e81a7
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-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://druttle.ru/wix?keyword=solar+ovens+research PDF link annotation
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/7763320.pdfIn PDF document text
    • http://reduslim-europa.site/dekojototegafamibutiv3s3iy.pdfIn PDF document text
    • http://umkatrade.ru/vipulubodag6haz0.pdfIn PDF document text
    • https://xonutadeb.weebly.com/uploads/1/3/0/7/130775355/7599433.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/pasodig_werefifilil.pdfIn PDF document text
    • http://navaram.online/torn_labrum_hip_pain_reliefxbnyz.pdfIn PDF document text
    • https://cdn.sqhk.co/figoveraboj/negdgcW/s2000_turbo_running_lean.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/qjdiiGN/38802713387.pdfIn PDF document text
    • https://guzagotoxi.weebly.com/uploads/1/3/5/3/135313280/mojuxukekidis.pdfIn PDF document text
    • http://keepmaxi.space/battlefield_2_complete_collection_passwordkngsn.pdfIn PDF document text
    • https://pogiwaxo.weebly.com/uploads/1/3/5/3/135312355/wogijetisakuxoro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_c325bc2862f14a1281d4788d0b13c5b1.pdf?index=trueIn PDF document text
    • http://segixiw.epizy.com/ultrasound_guided_occipital_nerve_block_technique.pdfIn PDF document text
    • http://vebaxabono.epizy.com/15787091077.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_622db3a74db14f439f6e1ab6db3121c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd216558-cb08-4247-bcbb-08b683db29e1/can_i_use_my_panasonic_camcorder_as_a_webcam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fca294-a7f9-454c-a834-36c28a238b82/96410500531.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_off0000ee7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7C 5048 bytes
SHA-256: e998685219c69e530e30a64d01b63c2c521503f21d05887f4c180f0a8eda86a1
font_01_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 10768 bytes
SHA-256: d53ba455060a113cafa7e6be59c55726990c86dbc59e9b5fa86c3a467f614da1

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