Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d8970150006a96…

MALICIOUS

PDF

113.0 KB Created: 2021-03-29 15:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1743dae6dfb78848fcd92613e837a03 SHA-1: 8b235b0fb5bedfb0cc4f4975755939d3d63cc2fb SHA-256: 34d8970150006a96986e4d286a9e77399d47b145c92cdec9f98e78f864ba3c26
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 0.9998

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://midufefew.ru/wix?keyword=persona+5+royal+confidant+hangout+guide PDF link annotation
    • http://kupiokno.su/58874368611f00oq.pdfIn PDF document text
    • http://hook-up.fun/32640401285euqmd.pdfIn PDF document text
    • http://nedivebepize.iblogger.org/judge_this_cover_brittany_renner_book.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/93457407865sjwrp.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/jigijDQ/vulagopof.pdfIn PDF document text
    • http://spainwow.pro/95804972830mr47t.pdfIn PDF document text
    • http://alexandreablog.com/daily_mail_tv_reportersvaisa.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/thcn1ic/southern_nh_fire_alerts.pdfIn PDF document text
    • http://pitushok.space/tejarawetumigit3x38z.pdfIn PDF document text
    • https://cdn.sqhk.co/jelobasuzet/iaCA2Ib/xevukewipanesazizan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_a22696f107b944e28f39508ea656bd9a.pdf?index=trueIn PDF document text
    • http://narajogevimoxe.epizy.com/ligedarubuvezejirokuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cbf53f-5192-4da8-aaf7-f1dc5c9ca229/study_big_data_analytics_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de0e482-9742-4820-9a95-7b46db0afeb7/69224711854.pdfIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_9c13837531164ab58cf43d0a228dda1c.pdf?index=trueIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_f3e98ddfec604f45b95f4e81355af1ae.pdf?index=trueIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_cdb0ed7bce6240c0a7ba05fb23b9a293.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E7E 5508 bytes
SHA-256: 3c480b1649cc3e8c59f819eff1b64ff0fb6bbac753df6dbab6898ca298ee944b
font_01_sfnt_off00019141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19141 10924 bytes
SHA-256: a29c8603018a305d5f784d9dc57e9d3d2def9258353955d2c060a6aa7cec811b

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