Malicious PDF — malware analysis report

Static analysis result for SHA-256 0232730c69bd3c7b…

MALICIOUS

PDF

69.2 KB Created: 2021-05-22 16:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e65d380761ae14b9a4b984a09bcea10 SHA-1: ad593e89205ebf5305326d4474fd846c70452e85 SHA-256: 0232730c69bd3c7bba6992d71d5a88d6f60f5aa81836a4e579fcc56ee617bf16
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to potentially malicious domains, indicative of a link farm or phishing lure. The heuristic PDF_SEO_LINK_FARM and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://jacksth.ru/strik?utm_term=my+t+mobile+account+number
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/fajov.pdf
    • https://sadusobagobazep.weebly.com/uploads/1/3/0/7/130776682/zudopapiboboxi_towez.pdf
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/madomu_rawusotevi.pdf
    • https://zugasemoz.weebly.com/uploads/1/3/4/5/134593751/gukigeba_rupupebenas_norarurozo_kogimekema.pdf
    • https://zutuvolesem.weebly.com/uploads/1/3/0/7/130775525/4219479.pdf
    • https://salupoxegiras.weebly.com/uploads/1/3/5/9/135961269/duzikose.pdf
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/7d075bcfe2.pdf
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/410f3764eb8.pdf
    • https://pakopigame.weebly.com/uploads/1/3/0/7/130738837/jubar-womulibaned-mezezu.pdf
    • https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/7ce0db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6c6c9d39-c1d7-4ad0-bc97-ad3fb45cd5b1/50910732737.pdf
    • https://s3.amazonaws.com/farezelof/7461945806.pdf
    • https://uploads.strikinglycdn.com/files/8c35fe25-9539-4c18-9756-ee9906049e22/dekafegunekonozopuse.pdf
    • https://uploads.strikinglycdn.com/files/a4100822-2f65-4c08-b2c3-4a5a6a44f9a1/53906565387.pdf
    • https://s3.amazonaws.com/pafiganovavi/razazojamojejobiridaxij.pdf
    • https://s3.amazonaws.com/fowikorejodi/international_marketing_management_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/bcc5fb36-e794-4d22-92e2-88c553724fd1/warcraft_3_reforged_offline_custom_games_cheats.pdf
    • https://s3.amazonaws.com/fedufiporara/what_does_jewels_mean_in_the_bible.pdf
    • https://uploads.strikinglycdn.com/files/b5676b5d-dad1-42f2-94b8-5f0a3261f81d/xurosipe.pdf
    • https://s3.amazonaws.com/lijopavexanuse/murusofupokopulibutubi.pdf
    • https://uploads.strikinglycdn.com/files/37696a24-2702-4a85-a05b-cf680c66ed46/kufajagelozeselewaxuxezag.pdf
    • https://uploads.strikinglycdn.com/files/82b58f87-aad1-478a-8745-9116cd827619/votekenokunetivexupubuge.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_off0000d3ca.bin
fb5f215502f9bd701ddfc0e2a33d82ea2c80de782782fff1bf4497b57fdb4750
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 5012 bytes
font_01_sfnt_off0000e4d2.bin
9069b2765111dced9bd8bcc8173d832943618ed9996ee85d2fd3795e28aa7da3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 10100 bytes