Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db3e087ea935007…

MALICIOUS

PDF

79.5 KB Created: 2021-04-25 16:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c0753336cbc5f9fc9004236db140acef SHA-1: c93ff561a46b7cf85c14dca8572e9dfd2afd47da SHA-256: 1db3e087ea935007f1481c7ce491ef5e35ecd8cd48f4564ed8acf7a7f642f7c8
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically using a link farm to disguise malicious content. The presence of numerous external links, many hosted on disposable domains, and the ML classifier's high confidence score indicate a malicious intent. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/strik?utm_term=mars+attacks+full+movie+in+hindi+download+300mb PDF link annotation
    • https://cdn.sqhk.co/mewidexe/AihjauU/kumusotofalenirinekizin.pdfIn PDF document text
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/sepujene.pdfIn PDF document text
    • https://wabobileminila.weebly.com/uploads/1/3/5/4/135400898/wamusudebosipaguki.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/5888630.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/hejhiet/matte_black_crackle_nail_polish.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/0ieNgiN/soccer_football_games_live.pdfIn PDF document text
    • http://sberhome.ru/saruvoxewaregefapurosfnuq.pdfIn PDF document text
    • http://osummer.space/kegusojiwugacoc4d.pdfIn PDF document text
    • http://reassurez-moi-fr.info/51917557131w8oq0.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/giPthgM/last_day_on_earth_zombie_survival_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/jalixuwefes/Yzmdgir/aerial_hoop_performance_outfits.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_7b267291f97947e68e220c0f542b040a.pdf?index=trueIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_19d9de8f25c546c696f2ce47aeb14b67.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_8d2ce1cfc67749159de4b74529702822.pdf?index=trueIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_2f18f812a2064ac3a9f933140e353ac3.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_0888d918fc8641ab9cf2778288eb484b.pdf?index=trueIn PDF document text
    • https://190d602c-e74a-4ea1-b1d2-d722d7947d0f.filesusr.com/ugd/1eddd4_4a243ddc674f4ebab37ed508b16f3fe0.pdf?index=trueIn PDF document text
    • https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_9c031492d8d34ffa91d9aaabbd234eb5.pdf?index=trueIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_d389af0883a246f2a548306fcaa46df0.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_1f274ce9d2114223aa0c56c7e85d0e21.pdf?index=trueIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_aec3e81887eb4674af54eb357695af2e.pdf?index=trueIn 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_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 5928 bytes
SHA-256: 4eca2e7c5d50d8f8f3acd46cbbd8a81a562463eecf24729f9049290814a1a3ad
font_01_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 10956 bytes
SHA-256: dfa1259e97a0b8702e156ced9d02c585fb36e018179390b22284095eb0a62e83