Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2d9f0ffbc001b8…

MALICIOUS

PDF

80.0 KB Created: 2021-05-25 03:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9b34b5a95c6f49e1990356f3be969a4 SHA-1: 7695d0fc455f9067ad2088068b7c206d0d8f01c2 SHA-256: fa2d9f0ffbc001b8d37099d2653768517c84d7a9a8cdebb5e74d9e48985af206
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to drive traffic or distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as https://jumiwimov.ru/strik?utm_term=download+film+habibie+ainun+full+movie+hd, are likely part of this distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=download+film+habibie+ainun+full+movie+hd
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/2789108.pdf
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/zabati.pdf
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/6759208.pdf
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/pekadovul.pdf
    • https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/5767139.pdf
    • https://najovukuno.weebly.com/uploads/1/3/1/4/131453374/3a1fed.pdf
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/nipubudul.pdf
    • https://zimazegikej.weebly.com/uploads/1/3/4/7/134732290/22070.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dinilederu/arcee_transformers_cartoon.pdf
    • https://uploads.strikinglycdn.com/files/cf55fecb-5891-4065-8c31-e6f02f1677db/who_invented_l.o.l._dolls.pdf
    • https://uploads.strikinglycdn.com/files/a1daba72-4943-4f34-a7d6-8a74c55b731b/90831397958.pdf
    • https://uploads.strikinglycdn.com/files/2beaed57-12c7-4dbb-8b37-3a2af1a05935/79266820620.pdf
    • https://uploads.strikinglycdn.com/files/d214c012-38d7-4333-b378-cb7934bb90d3/41295742190.pdf
    • https://s3.amazonaws.com/vapelurowar/motu_patlu_ki_jodi_cartoon_tinyjuke.pdf
    • https://s3.amazonaws.com/jeworurowam/kapuzutisizer.pdf
    • https://s3.amazonaws.com/borokegujuzero/56504601151.pdf
    • https://s3.amazonaws.com/pajeriramal/how_to_use_random_number_tables_in_statistics.pdf
    • https://s3.amazonaws.com/zozuxukoxo/20269542156.pdf
    • https://s3.amazonaws.com/benubapopikaj/writing_chemical_symbols_worksheet.pdf
    • https://s3.amazonaws.com/pujinit/vscode_for_ubuntu_16.pdf
    • https://uploads.strikinglycdn.com/files/7f53df8a-5d94-4d6b-8a23-c2837a58dbb4/warhammer_40k_tau_codex_mega_vk.pdf
    • https://s3.amazonaws.com/subopukomanaw/bewawu.pdf
    • https://s3.amazonaws.com/fulazelof/22977451747.pdf
    • https://uploads.strikinglycdn.com/files/724b418a-f32b-4a9b-83d3-63811baf428e/dejem.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_off0000fced.bin
2891404174b089b5d77ec62a8bc3371ff55bde3191fc68ec7cd900c45bf99f1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 5164 bytes
font_01_sfnt_off00010e7b.bin
8ec94c5c02470868195831c5e39927f32d891eb3078af2b53de9eb596c3b9f8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 10632 bytes