Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c208229ba88a52…

MALICIOUS

PDF

78.2 KB Created: 2021-02-28 15:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 96ff47b19fa56941c1984f99e4fb800d SHA-1: 64314360ffa51e827b10050563cf06572fdef599 SHA-256: d8c208229ba88a524f701a01f5e8bd9c9b4efe780702b13aac190c0e587f5735
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URLs, with a primary focus on `https://seumenha.ru/wix?keyword=the+answer+iverson+shoes`. The PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, suggesting an attempt to distribute or redirect users to other malicious or phishing content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=the+answer+iverson+shoes PDF link annotation
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/6755028.pdfIn PDF document text
    • https://gegadibiliwo.weebly.com/uploads/1/3/1/8/131871883/2962697.pdfIn PDF document text
    • https://gedofulijul.weebly.com/uploads/1/3/0/7/130775434/genenozerod-riputopi.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/6jiibgo/34___2019__youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/jbkhLbx/mercado_pago_peru.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/hQii7gf/sasoritijinuvakibi.pdfIn PDF document text
    • https://xalidanazate.weebly.com/uploads/1/3/6/0/136082238/2871494.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/fuvat.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/wedimapigevudux-laxukemosudedax-junutufukazuvap.pdfIn PDF document text
    • https://mozovarowojexi.weebly.com/uploads/1/3/4/8/134867055/e97f50f58d468d7.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/wigadunotabi_nodegupiwimanek_nogejumu_bevoza.pdfIn PDF document text
    • https://fubupudixad.weebly.com/uploads/1/3/4/7/134742266/1770816.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/printable_weekly_work_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/68720927496.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/59274701255.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/fortnite_week_10_challenge_guide_season_7.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/4740377349.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/73513915176.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/gitlab_command_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/how_do_you_set_a_timex_indiglo_digital_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/google_play_store_app_apk_file.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_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 4844 bytes
SHA-256: 5f7a736426ac1b46c13aaafbfc4d5fd20509d2cacae866ee46eb47beea2d25c6
font_01_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 11872 bytes
SHA-256: ba553d9ec40ac51f5dc8395b6b428675797b96b1469ce583494b742b94b4e2a6

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