Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac9ef40a168bdd9…

MALICIOUS

PDF

68.0 KB Created: 2020-11-17 14:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ba5e0d51bae3afbd88982f234b4d775d SHA-1: df9959d9005fb53eedc3a72cfe5527efe95bacdd SHA-256: 3ac9ef40a168bdd9c33e03fd78597997b7dab1f600fb82c6102980dcb1901e38
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating it hosts numerous external links, likely for malicious redirection. One of the primary external URIs points to 'traffking.ru', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

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/123?utm_term=http+twitch+activate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f933b7d4ec87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f99e1c278882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8b230570cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f9436374ac72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5fb372c9d19fe.pdfIn PDF document text
    • https://woluxivevarot.weebly.com/uploads/1/3/4/6/134672831/pesinap.pdfIn PDF document text
    • https://tuvozejuwubox.weebly.com/uploads/1/3/4/3/134323710/lerevivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f871c2989dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f8e7d89597a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fad5e007fbd6.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/fapaga/33475931626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e689f1c-dfc5-4c7d-810e-1d8d40d6f582/2_accounts_apk_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6b4622-78d2-41fd-b6b0-2e199ece806c/paul_arden_it_s_not_how_good_you_are.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/beckhoff_plc_programming.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC340 4400 bytes
SHA-256: 1983ca6880b45dbece54f28bcc12c59ab2e19d347b2ee577b1b60d32abc00ea8
font_01_sfnt_off0000d24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 10292 bytes
SHA-256: 436a5e36e6a0e94f6d387abe4dc37aa54b103fc6e7ae9afec5361a8ed252ff01
font_02_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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