Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c136d4ab9f4e7f1…

MALICIOUS

PDF

67.9 KB Created: 2020-12-04 13:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 074cf07426be8fe030d4e0fda87048fd SHA-1: ddba6ff22778d667ab9b0813c2b3307f52b258ec SHA-256: 2c136d4ab9f4e7f1baeba6e920b081726ce0918c9f9dbbf55c6c746c9673482f
156 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 5

  • 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.
  • 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://traffking.ru/strik?utm_term=delonghi+coffee+maker+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f902dd72dbb8.pdfIn PDF document text
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/derenuvatop_vabebataduvinaw_topepa_ruvisedoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_5fc0b6eeb4227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fa748ba0f110.pdfIn PDF document text
    • https://dufanidozit.weebly.com/uploads/1/3/4/7/134764520/zizegedini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fc098ddd5cf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fb6ca4689d06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0ee2d334513fae44668a/1606225640218/78231428544.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52db3104edf1d779cfc51/t/5fc6c58a0623334b0c4a1985/1606862220057/xomepadiminuninad.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/66362121318.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6c4e5c7695ca99bf722/t/5fc3d4835147b14804a81b77/1606669444069/advanced_open_water_diver_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58fccbf71053ccb2f4d5f/t/5fc984d5acaba31734552279/1607042261659/979931431.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c55440f1034a5ca82015/t/5fc2e3259b1ed035383c6241/1606607654621/71001134465.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3856e2e34347c7054c27f/t/5fc93d393080306a4d3aa213/1607023929880/vitamin_cottage_hours.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ca29ee0f32b8749f73a/1606372515364/fur_elise_piano_easy_letters.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_off0000cc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9C 5180 bytes
SHA-256: d2f0dad97bb6c3450c88affacdb4622366a80778121b78e98f4ae34ae7d5bf35
font_01_sfnt_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 10952 bytes
SHA-256: 29f636d5e35d8ce7f8e7249a971f2cdf5277ae694d89e3dd79fea06734cadbb0

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