Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a08d44e36a868d…

MALICIOUS

PDF

66.9 KB Created: 2021-03-22 06:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6262727deff56a7136610229a05ccd0f SHA-1: 3ce7caf3d75eb98c1977244e5117f8808b3eac66 SHA-256: f4a08d44e36a868d279114c9de5688d070082a1ed99c9e50c4783f5011b3caef
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 0.9996

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://crophysi.ru/wix?keyword=california+jurat+with+affiant+statement PDF link annotation
    • http://gexuniganije.iblogger.org/how_to_score_self_correction_rate_in_running_records.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_5fca8312d7750.pdfIn PDF document text
    • http://chempion.coffee/final_fantasy_7_remake_xboxxza1z.pdfIn PDF document text
    • http://bugexaruxajomux.iblogger.org/wozopagit.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/10527838440db122.pdfIn PDF document text
    • http://all-system7.club/76272179975rzs8y.pdfIn PDF document text
    • http://xumegexujarev.22web.org/91968616931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_60460897a0b8c.pdfIn PDF document text
    • http://shortsomfj.space/sirunivoyvw38.pdfIn PDF document text
    • http://bufo.online/the_last_song_book_charactersce8su.pdfIn PDF document text
    • http://kernig.pro/kuraxedorezuzexoggt7v.pdfIn PDF document text
    • http://instapriz.online/petroleum_engineering_salary_per_month_in_nigeriagbbso.pdfIn PDF document text
    • http://zuzitijimopa.22web.org/zuzerugeduzetifinididobeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447450/normal_5fc9ad1816fe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419211/normal_5fecc1dfa117f.pdfIn PDF document text
    • http://prechambre.xyz/letter_of_creditable_coverage_formdhbtg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489429/normal_6012cbe64fc7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_5ff2f08195090.pdfIn PDF document text
    • http://tokio-2020.fun/z-line_claremont_desk_assembly_instructionsxfmlh.pdfIn PDF document text
    • http://sport-stavki.fun/68176670426edrbl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://parorusoba.rf.gd/login_template_bootstrap_asp._net_mvc.pdfIn PDF document text
    • http://dusilasazeli.rf.gd/the_last_song_miley_cyrus_singing_in_car.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

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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 5080 bytes
SHA-256: 71d729160a7de0a97f39fd74cb7ed005feef8e4c9ef1078fb0859f964d40d08a
font_01_sfnt_off0000db7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7D 9964 bytes
SHA-256: a1b5efceac31dcbd33810bb3a2d011b53460e51ec4e1ced4cc60ffc6c60d60e1

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