Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f5fb4a9d2759ae…

MALICIOUS

PDF

86.5 KB Created: 2021-03-25 05:18:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4fef4c51901315e79bb07a786af6d2f6 SHA-1: 9e6456337e2371cb1698369ad6a9ce8c2442581f SHA-256: b1f5fb4a9d2759aefbea09dbfe2cc620a9bb0d000907908f5fae53ff8d31f3f6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://resalured.ru/aws?utm_term=used+snapper+hi+vac+lawn+mowers+for+sale PDF link annotation
    • http://regse.website/19419051840by0yr.pdfIn PDF document text
    • http://idclick.cash/how_to_use_hp_deskjet_f4580_wirelessikus2.pdfIn PDF document text
    • http://genusadnlo.space/42648180490zdz53.pdfIn PDF document text
    • http://profapp.pro/ibsen_brandluf8o.pdfIn PDF document text
    • http://shoplus.info/what_is_the_tone_of_the_poem_a_lady_by_amy_lowell3jbhg.pdfIn PDF document text
    • https://woxumonukoke.weebly.com/uploads/1/3/6/0/136090180/a59672b10ff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_60443e5a84fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_60446cfbf4071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_5fd979ec78700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_601adffea4de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_602acd49edc67.pdfIn PDF document text
    • https://sokijolixorinus.weebly.com/uploads/1/3/1/1/131163896/lixevoji.pdfIn PDF document text
    • http://electorat.org/tesumexnff2c.pdfIn PDF document text
    • http://dle-tpl.site/speed_queen_stackable_washer_and_dryer_setipeab.pdfIn PDF document text
    • http://itwow.info/mowunepisibivepawozcilf.pdfIn PDF document text
    • https://vepaxanejabag.weebly.com/uploads/1/3/4/3/134317352/pawopasikujizi.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/457487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zazifikas.epizy.com/manuel_antonio_park_guided_tour.pdfIn PDF document text
    • http://magonusu.epizy.com/brave_browser_apk_apkpure.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/20002798985.pdfIn PDF document text
    • http://pisibagavorinow.epizy.com/troubleshooting_genie_pro_screw_drive.pdfIn PDF document text
    • http://kojidazazixom.rf.gd/vebezilewegivupuk.pdfIn PDF document text
    • http://pipixaf.rf.gd/telotexatazasado.pdfIn PDF document text
    • http://leduwutavi.epizy.com/29382620893.pdfIn PDF document text
    • http://luwegovufa.epizy.com/13252787057.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_off00011318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11318 5540 bytes
SHA-256: 88a159c4248d78d4151eaa02dab59a89b87e48325ba5bf90d1a853ae01f5e2be
font_01_sfnt_off000125e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E0 11336 bytes
SHA-256: a8e662abf00cb5a81b6b0024d46af43451749fd7d88ae0bb2135c4ea97d44d25

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