Malicious PDF — malware analysis report

Static analysis result for SHA-256 3667f3ee3eddab55…

MALICIOUS

PDF

70.9 KB Created: 2020-12-25 18:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d912311147f3c76876e63e19c157eecb SHA-1: 4548604d22db0d52ff81e65f8375597497785fce SHA-256: 3667f3ee3eddab55e5e6e15f8c3f0a4dc5ece8ba342c6d7fed5969efc6073bfc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains and are structured to mimic search results or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to external sites for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafffe.ru/wb?keyword=automatic%20music%20disc%20player%20minecraft%20java PDF link annotation
    • https://cdn.sqhk.co/jajotulix/hScVOja/xaragedovofevufiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/hcJhfhb/nintendo_switch_brain_training_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/RidJjih/legigagajidakuwamosuw.pdfIn PDF document text
    • https://kusuvafivubiret.weebly.com/uploads/1/3/4/8/134888197/db97cdc7bc2971b.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/hgficjh/school_days_song_chuck_berry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_5f980bdcda500.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomekurufe/PEc7Tjh/monkey_banana_jungle_adventures_dominican_republic.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/hejfD7O/twisted_sister_lead_singer_now.pdfIn PDF document text
    • https://nunezexivu.weebly.com/uploads/1/3/4/4/134440215/319ea06bc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d474a9-cc79-4382-910a-a11e4446da9b/15027108342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1f3331-044e-42e9-a46c-197a3fc99cd3/zuvon.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/peridaposanetawujel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645c112b-899a-4794-bf17-a95f8145be4e/high_sea_saga_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4f351f-0125-47e8-92f5-e3565aa6e068/dalotamajesokiwenuxesaro.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/imf_report_on_india.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_off0000d601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD601 5528 bytes
SHA-256: 2115e8504dfb2b2c9a734466d5d43d7fdb7af3bcca296ee469b7c448ff7f8bf5
font_01_sfnt_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 11048 bytes
SHA-256: 3452532d067f274d4639d4ab822705d335776985ca015bb2515d3aede2e8eadd

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