Malicious PDF — malware analysis report

Static analysis result for SHA-256 6988171505ab3a43…

MALICIOUS

PDF

73.4 KB Created: 2020-11-20 12:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 140bacab687dd6812804bf49fed595df SHA-1: d287332352985b59cc4389e21350be4587a006ad SHA-256: 6988171505ab3a437ae148783916340e9bf9c0a5aca09359faad2eefcdc13ae2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=d%2526d+beyond+stirge'. This URL is identified as malicious and is likely used to lure victims to a phishing or malware-hosting site. The ML classifier and ClamAV also strongly indicate maliciousness, supporting the classification as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=d%2526d+beyond+stirge
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1d826714-6adc-42a9-ace5-2f99b4b2505a/battlefield_2_single_player_mods.pdf
    • https://s3.amazonaws.com/fapaga/cookie_clicker_hacked_2018.pdf
    • https://uploads.strikinglycdn.com/files/477a15c7-cc07-4812-b06c-7e1c5ba19198/bharathiar_university_mba_books.pdf
    • https://uploads.strikinglycdn.com/files/b5423cee-c088-4720-bec0-fde26c373860/sanyo_katana_xl.pdf
    • https://uploads.strikinglycdn.com/files/c824044a-6d15-46f4-930c-c691b59a83e0/76406763702.pdf
    • https://s3.amazonaws.com/risalenefazozo/darkness_of_dragons.pdf
    • https://s3.amazonaws.com/divikufifir/naxusizu.pdf
    • https://uploads.strikinglycdn.com/files/50c99882-9e52-4231-a9da-195cd8b4e670/1329625267.pdf
    • https://uploads.strikinglycdn.com/files/6003657d-0ef6-4793-9535-d5d1afde4aea/55436682800.pdf
    • https://s3.amazonaws.com/remeranexe/fizilekak.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/64253448026.pdf
    • https://uploads.strikinglycdn.com/files/ab3c8c45-9ec1-4e9d-9e1a-064e03ae885a/plants_vs_zombies_2_apk_android.pdf
    • https://s3.amazonaws.com/dogazisuze/vobotutas.pdf
    • https://uploads.strikinglycdn.com/files/b78621ca-da7c-4bd0-9237-365f646a63a0/2007_toyota_camry_hybrid_owners_manual.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_off0000de69.bin
e28c3d75b71adbbf3e3f51f1fa20b85ae8a239f1e87d766e9236934b86ab0752
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 4156 bytes
font_01_sfnt_off0000ec97.bin
3b2d2c855416893311ca24fd2b1ab564f99347dd7b0221086bb2a3ca8c743b30
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 15240 bytes