Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c01cd3a0f6d1b07…

MALICIOUS

PDF

81.4 KB Created: 2021-05-06 02:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dec7f3ae87cba46dd84fdfcfdbc16bed SHA-1: 9fd49a2e6bb35b5a2d4b883c8802332799f16ff6 SHA-256: 8c01cd3a0f6d1b07ecfe3742283890f4f03b5d912e05763e793f08ea34f58a6a
126 Risk Score

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://fokemale.ru/strik?utm_term=i+heard+you+paint+houses+audiobook+cd PDF link annotation
    • https://voduzivesaduv.weebly.com/uploads/1/3/4/4/134456438/vepowoton.pdfIn PDF document text
    • http://sneakerspapa.store/91538259291npgko.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/guidelines_for_performing_systematic_literature_reviews_in_software_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/igejijc/nasal_congestion_spray_for_toddlers.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/37227967130.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/bernard_shaw_heartbreak_house.pdfIn PDF document text
    • https://buvupoxiku.weebly.com/uploads/1/3/4/3/134329971/newonapaj.pdfIn PDF document text
    • https://kamejufozafa.weebly.com/uploads/1/3/4/8/134891268/pubumap.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/iejiLKi/stickman_and_gun_2.pdfIn PDF document text
    • https://vipavogezeguw.weebly.com/uploads/1/3/1/0/131069860/lodud.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/PfZxria/space_war_game_app.pdfIn PDF document text
    • http://kapusta.pro/how_long_does_it_take_to_get_the_best_friend_emoji_on_snapchatlrrwt.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/3hdihm8/naxavobemabigavosejusoxez.pdfIn PDF document text
    • http://sfhgfje5df.xyz/when_you_care_too_much_what_others_thinkg4jlw.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/business_communication_today_global_edition.pdfIn PDF document text
    • https://lomivurusizova.weebly.com/uploads/1/3/4/8/134868764/992e6.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/Sihidif/lijufubilopef.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/fajujiju/types_of_non_arguments_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/retudoxus.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/33794887222.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_off0000fc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC04 5372 bytes
SHA-256: bc55255851de22c1233ec52e9eed54f98b0f7f96b4eb04fc817a5c92538c066d
font_01_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 12912 bytes
SHA-256: a0aac9483e5d9402ff94fbd3d377490cacde657af12c0cf41a6830512e535af1

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