Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2798418dd4d411…

MALICIOUS

PDF

78.0 KB Created: 2021-03-17 23:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 84bb6288ba83585e653c55983ab39023 SHA-1: b313a8dfafc2b54f0af3236eabb76c8f29c0ba1e SHA-256: fa2798418dd4d411967114976abcf4467d2965d070c3c4144661fd8efeae87f3
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 0.9997

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 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://maypoin.ru/award?keyword=personal+balanced+scorecard+pdf PDF link annotation
    • http://somubuzesixuwun.getenjoyment.net/wukitanokigavo.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/zevoboxiguxedejokabej.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/gghjjdj/surafuzorogogu.pdfIn PDF document text
    • https://sekekipozikevaw.weebly.com/uploads/1/3/3/9/133997985/6558621.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/auriculoterapia_pontos.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/povok.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/nikon_coolpix_p520_manual_focus.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/fibjjij/62011702386.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/40227020986.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/4890252.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/cloud_atlas_famous_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/egdIEI5/38697013902.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/c380bb4b-b94d-46ce-ae09-618054434095/73806490529.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/39322000151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e73352-8c49-4b84-b540-2587a37920d2/babemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6f10c3-5bcc-4b47-92b4-e02edcb8fe55/golf_buddy_l10v_rangefinder_review.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/nuxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e282d4fc-5cc9-4796-9679-1f56344a800a/vetobiwegibatuvoboforipov.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/sample_risk_assessment_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/carrie_underwood_american_idol_finale_performance_2009.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/truyn_kiu_thnh_phim.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_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 5288 bytes
SHA-256: 730673e162bd8cee92401f6c7cf0f61be7ff596e929cdda6035009e25dd0128d
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 11468 bytes
SHA-256: 52aba2ac4e0fccd9260fe904f554cb64a7ea5eae0d362e4933c8a527158b2271

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