Malicious PDF — malware analysis report

Static analysis result for SHA-256 2108201e7535275f…

MALICIOUS

PDF

89.9 KB Created: 2021-03-24 19:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74b8f7f13cbdfcd67a8193e0fb0f3d20 SHA-1: edf2d74ee00e6c645a9ffa63c9b7df7a3cdb4b5e SHA-256: 2108201e7535275fbdb755ef3c08831eaf0a004acb76923c062ddd6a7f950394
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=asme+section+viii+2020+pdf+free+download
    • http://fakts.design/44171352721fb8zy.pdf
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5fd620dda4893.pdf
    • http://skameyki.club/taurus_man_secrets_free_downloadc2xro.pdf
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5fe8a164b64da.pdf
    • https://cdn-cms.f-static.net/uploads/4485589/normal_5fdafd74959a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_641335ba2d424786800eef09109325b2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/93c3cf67-d5c7-4bfc-a6e4-8285ec76fc5f/zulopoxata.pdf
    • https://s3.amazonaws.com/gebukil/super_mario_land_2_secret_exits.pdf
    • https://s3.amazonaws.com/zijivevip/fowezo.pdf
    • https://s3.amazonaws.com/jivuxo/benisa.pdf
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_1536483e962d4713ab63041cc9d12777.pdf?index=true
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_9d175ba89a56438aaf0cefe9472ab18d.pdf?index=true
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_283b2394c11649bbb8d7a082b737c8a7.pdf?index=true
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_ec45d37e969b4621a16b22234ac87340.pdf?index=true
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_ac6195f2301242919ae3c57ca4930a06.pdf?index=true
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_4428e9cfe27f40b799902e60bb4c874b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6ac9b121-5be0-4ee5-9bf2-322a9fc2a047/15695747173.pdf
    • https://s3.amazonaws.com/debamijizozexo/what_is_a_navy_page_4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011413.bin
7d37982966da29531b7f78eb6e0ca912fa682a4011710709092d33d5aea3d55a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 5504 bytes
font_01_sfnt_off000126ba.bin
214ea779d98646006d6e72b3d5b194ac811ded81142f722bde57173ae7d3c9a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126BA 11088 bytes
font_02_sfnt_off00014c5c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C5C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.