Malicious PDF — malware analysis report

Static analysis result for SHA-256 9194fb18159fa2b7…

MALICIOUS

PDF

70.6 KB Created: 2021-02-15 21:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 5c5e39bb6f2893e3c0318be7847329d3 SHA-1: 0694911bd0607150465cf832a3bece8526293baa SHA-256: 9194fb18159fa2b7348830457d67bfe4850f7ba9186d874ba9fff025cac53fcd
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 suspicious domains, indicative of a link farm or phishing lure. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', and ML classifiers also flagged it as malicious. The presence of embedded URLs and the overall structure strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=parallel+myths+book+pdf PDF link annotation
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/61c863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_600c06ff29ca8.pdfIn PDF document text
    • https://powipopes.weebly.com/uploads/1/3/1/4/131406611/2825730.pdfIn PDF document text
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/padesoto.pdfIn PDF document text
    • https://janodiwuzujemux.weebly.com/uploads/1/3/1/3/131382133/vewor.pdfIn PDF document text
    • https://litemavokof.weebly.com/uploads/1/3/1/8/131871991/8630df.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/nofadoletex-welazakipa-pusizibiwoxavu.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/Zhejbig/55670739833.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/rheeKb4/california_furniture_modesto_ca.pdfIn PDF document text
    • https://didunoduwogu.weebly.com/uploads/1/3/2/6/132682107/6e77b7e05005ef.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/xikejebemujuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5ff19b8c50b7a.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/0gjYYjj/my_dream_house_design.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/gdegija/build_it_better_aron_wright_lyrics.pdfIn PDF document text
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/393956.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/17317576955.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/candy_crush_game_for_pc_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/zuxel.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/innisfree_sheet_mask_review_malaysia.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_off0000d78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78A 5588 bytes
SHA-256: e818de3d677679bc7acdbeaa59ea236b067b64395e65d85583ec1119b2abb71f
font_01_sfnt_off0000ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 10348 bytes
SHA-256: b7c42b0ba238560e9ea823fdad02f0b818b96355a1ac96d0c182f31ffa00ea27

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