Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe868778f762e093…

MALICIOUS

PDF

83.3 KB Created: 2021-03-24 17:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bc07133379ecec880690555c14d232d8 SHA-1: 5042390d2cfc2e3170fdb24dcb1d97853135f835 SHA-256: fe868778f762e093fa7aacfc34c2b039e54f8be59db745e5ed527cb26491053d
156 Risk Score

Malware Insights

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

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=most+valuable+amazing+spider+man+comics PDF link annotation
    • http://gukabibus.mygamesonline.org/bullying_escolar_peru.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/qhcrSgj/giwutaripifakofegiju.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/lidaruzowulanifedefiluga.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/qJjcgg1/casino_slot_games_free_play.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/sony_blu_ray_player_bdp-bx59.pdfIn PDF document text
    • http://dopogabijup.mywebcommunity.org/public_policy_analysis_william_n_dunn.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/hegrgjI/can_you_escape_horror_4_level_5.pdfIn PDF document text
    • http://kusufuxufatup.getenjoyment.net/11520593267.pdfIn PDF document text
    • https://cdn.sqhk.co/kamugututu/gjjhLge/35440791728.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/circle_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/handout_achilles_tendinitis.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/10386588784.pdfIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_3d4a9376c0ea4bcca3abc518cc2581aa.pdf?index=trueIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_1006effccca8445e9e2fcef9d1936de2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/aspectj_vs_spring_aop_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/angularjs_adminlte_template.pdfIn PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_bd24944bd87249c3a61f4f29c8e5e1c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopuze/cuanto_es_2_pulgadas_en_mm.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_cf88b0aad3c841d2a7d0dc4e72126668.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosevud/meritorious_service_award_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/jirofozugodozeba.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_off0001064c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064C 5648 bytes
SHA-256: 63f43afdd7837fdbac7223ef7b8e198c8596f97019e03218e8fa2667b11f192c
font_01_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 11324 bytes
SHA-256: 9f7e0fcde7bc38b4b0ed733b81a9c68c4a5d6b99e4ba49709eda98874b133a45

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