Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbb91ca607a9b83…

MALICIOUS

PDF

63.8 KB Created: 2020-11-18 14:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d781934fa4c8048663287501478b6973 SHA-1: 1d6568f4f77575f2cdfd6854e14db97f78fc3145 SHA-256: 2cbb91ca607a9b830476a1c885dd8f01f73bb0863e67e87ba87f6aa3b2cf14f4
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a very high probability of maliciousness. The embedded URL, 'https://traffmen.ru/aws?utm_term=boondocks+season+4+complete', is likely used to redirect the user to a phishing or malware distribution site. The ClamAV detection name 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further supports its classification as a phishing-related trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://traffmen.ru/aws?utm_term=boondocks+season+4+complete
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5faa519a1b749.pdf
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f903336aaea4.pdf
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fad792f54654.pdf
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/wotuf.pdf
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f920cb42a1c5.pdf
    • https://cdn-cms.f-static.net/uploads/4457561/normal_5fa08f4db97e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8bd09b3c-21e6-4346-b1ec-4151eafc1290/13156568430.pdf
    • https://uploads.strikinglycdn.com/files/124fc808-580e-470d-ad9f-3dffde7d6e68/portal_quest_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/3ea4eaaf-88d1-420c-bc9c-b7387946d77e/kogoxufijumefaj.pdf
    • https://uploads.strikinglycdn.com/files/9dd766b2-8255-426a-9e6c-ce9debf9a790/veludubulowokasasubez.pdf
    • https://uploads.strikinglycdn.com/files/f57b3223-34f5-488d-98f5-88c0c2490504/51623351156.pdf
    • https://uploads.strikinglycdn.com/files/3d845405-5d40-4508-9387-dd2e9de049d3/critical_role_the_traveler.pdf
    • https://uploads.strikinglycdn.com/files/994cae8e-a35d-4530-a1e1-1e0001f6ce12/nifejorivamif.pdf
    • https://s3.amazonaws.com/fifomi/kavefibanizofuruxumaxi.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_off0000bcf8.bin
32d7a9744b9fab8d2fc978685c0b2be2eeab6bd3ce1f53e9a8caf6f5cc5da1d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF8 5324 bytes
font_01_sfnt_off0000cf12.bin
984be2589b967a0ac9572e329f205c11c7dceaef2dff737641cee7f10a5a765a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF12 10380 bytes