Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe02538514eddaf…

MALICIOUS

PDF

59.6 KB Created: 2020-12-20 21:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54553ee9970387c191e0196f6d85da84 SHA-1: 52eeadc46b7c8b88f21e35a99a7305083727f9ce SHA-256: dbe02538514eddaf5d26e8944bfdfa00838a1612dfa819e66b237e3c91746a5f
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, including one pointing to known malicious redirector infrastructure. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier and ClamAV detection further confirm its malicious nature. No scripts were extracted, but the presence of malicious URLs is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/wb?keyword=bose%20color%20link%20not%20turning%20on
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f95f0ceb75c3.pdf
    • https://cdn-cms.f-static.net/uploads/4459467/normal_5fbdfc78a8272.pdf
    • https://static.s123-cdn-static.com/uploads/4446280/normal_5fcab8672c48e.pdf
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5fd7edc7083b8.pdf
    • https://static.s123-cdn-static.com/uploads/4370071/normal_5fce809660148.pdf
    • https://cdn-cms.f-static.net/uploads/4460686/normal_5fc189c84196c.pdf
    • https://ponixetuga.weebly.com/uploads/1/3/4/6/134668384/farebipowada_kezozag_lalirawumerefon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc4e843b8467722f1ed819c/t/5fc5ff8b08845d09245924f5/1606811533146/traditional_oral_literature_definition.pdf
    • https://static1.squarespace.com/static/5fc78deb5c272238a81acf84/t/5fd1c1ecef89ac6683765537/1607582189791/hill_climb_racing_2_cheats_2019_no_verification.pdf
    • https://static1.squarespace.com/static/5fc0873a11f6a4198483d0f6/t/5fcba0571880ce05e84e82e5/1607180376686/25810530481.pdf
    • https://static1.squarespace.com/static/5fdd525e5b7bc966055e3a6f/t/5fdd8b887514fb3b7632526c/1608354696364/jozuxomejuwusagikaje.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1a52b24ece27e9143ef8/1606228562941/sinnoh_elite_four_pokemon_revolution.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afd9.bin
48259d21fa7f348c87c34e4a768fcf2c5fe52c58cf4f541f36c95cf3f081a6cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD9 4872 bytes
font_01_sfnt_off0000c085.bin
5e9863a88a83ea57588b70dcc23755de95cd3db87c5a285f83215bd44a7300d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC085 10164 bytes

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