Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f07a100e5d1d68e…

MALICIOUS

PDF

80.6 KB Created: 2021-05-01 13:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ed0bd9b7a7f86a7b5574859e10596095 SHA-1: 7eed9caeea22050c6b4fe597761a23ffdf71704c SHA-256: 4f07a100e5d1d68ed1b34aed808b2aaaed8fa5a60aec2b93dacb663618a65645
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/strik?utm_term=can+you+play+neverwinter+cross+platform PDF link annotation
    • http://kutakelipaxeb.22web.org/athlean_x_shred_program.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/runut-metukeni-xejubegorimo-kipusozefaxe.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/02856c6742.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/7107374.pdfIn PDF document text
    • https://tegeluvosuvu.weebly.com/uploads/1/3/4/8/134873603/504139.pdfIn PDF document text
    • http://bagururidafu.22web.org/commercial_broiler_management.pdfIn PDF document text
    • https://zezebeburopixem.weebly.com/uploads/1/3/5/3/135326834/gawidotusobiz.pdfIn PDF document text
    • http://nusixogej.iblogger.org/rarizad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_4fa9c082dc5540f39142642b6ed4ccc0.pdf?index=trueIn PDF document text
    • http://godimodasixor.rf.gd/47677633326.pdfIn PDF document text
    • http://zezevefo.rf.gd/rixirivuguluvu.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_65742bcd6b4a4be98a16486715ae0a3f.pdf?index=trueIn PDF document text
    • http://fuzuxoluzetirig.rf.gd/denuvurulezesenikil.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_16930a52995749c1a11463c629dd8079.pdf?index=trueIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_02ea2de856d1455a86c4c9da4adfbd8e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavabi/zurawuzumojoponupime.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_558ebc1b49d042c2b09dbd4bb5869858.pdf?index=trueIn PDF document text
    • http://xokopaxitake.rf.gd/83200573400.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_2c1bad8383c54ba59e97920ffd899a6d.pdf?index=trueIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_5ad3cfca796a493fbceb7eb356a6a065.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/whatsapp_status_animated_video_song.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 5320 bytes
SHA-256: 1baf829401e0e4fbbdc52a89c8cf9088e8b48a8e9a490a3017a4b485f3c24902
font_01_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 10420 bytes
SHA-256: 45c346b6dc83121929b48d550d0c6b70ef6fdb82ca85e745c8aa198bc4853a70