Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66ae96faacfd033…

MALICIOUS

PDF

108.2 KB Created: 2021-03-14 10:26:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4ab415dd2fef5e84a1b99e2dfe620cb0 SHA-1: 547747a1a7d3d835090c98b21744ef2563c10b3a SHA-256: a66ae96faacfd033b17653a529050277f7330d56c0d7ae517d7a0b5bacd83e3f
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 0.9995

Heuristics 5

  • 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 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://xezojetit.ru/award?keyword=tamil+nadu+school+books+online+pdf PDF link annotation
    • http://ecoservice-vlad.ru/android_11_inch_tablet9heoj.pdfIn PDF document text
    • http://meetcabinets.xyz/27257668760wnnth.pdfIn PDF document text
    • http://copyright-infringement.business/pozuwbkkom.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/kuworiwogiwijosimixabu.pdfIn PDF document text
    • http://ig-objectionform.com/pitigala63iqf.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/42860459625.pdfIn PDF document text
    • http://instasurprise.online/40667877334y6p5r.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/97270999206.pdfIn PDF document text
    • http://tiktokfrance.fun/minn_kota_terrova_foot_pedal_-_cordedpx3sq.pdfIn PDF document text
    • http://lnstagramoriginal.com/troy_bilt_21_inch_replacement_bladeawjeu.pdfIn PDF document text
    • http://basvuruizleme.online/kill_aura_minecraft_1._8b7ckk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tixelupaninaber.rf.gd/arbitrage_pricing_theory_assumptions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec2b26c-2b17-40ca-87a8-4bd2e8525d41/80107974445.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/and_to_think_that_i_saw_it_on_mulberry_street_full_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a620d404-353c-4c12-b392-5499f3e4c699/the_raven_edgar_allan_poe_analysis_sparknotes.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_87e3b13afba84748a60058ba2d622f4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fff5cba-7b86-4768-a731-aafbb85cc994/cliff_swallow_or_barn_swallow.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_6ea0503b09dc4be6849aee4d5fff66d0.pdf?index=trueIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_dcc6d00d846b4e4c8411af55f71987b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98909e07-6015-4426-a7ec-1f7bf3c3d799/the_other_side_of_heaven_1_on_netflix.pdfIn PDF document text
    • http://suziwifu.rf.gd/73239573224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8967cc1c-f712-40f3-a4da-987f05c1986a/kuvevu.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_b9fddff1875c4468b9f0c94825e3a24e.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_off00016843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16843 5452 bytes
SHA-256: 310c2b849f0d48a5ebc3639bfceb384530195ae9a43f97f31d5071b908db8b6b
font_01_sfnt_off00017aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA6 11972 bytes
SHA-256: a699f893e1d0b9dd6c005d0dfbda0b6bf7fcac70ba1358d350d25d3a513cae1a

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