Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf65b837f1213ee1…

MALICIOUS

PDF

80.2 KB Created: 2021-03-23 15:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2a8b97d2e14e25d1aa9f89e8821b0182 SHA-1: b88d922240d0b3dc03a72f05e5c45c723202fc0a SHA-256: bf65b837f1213ee1c32b41cc80e30ff4e89eef9e78420ab204a43cafc65ef5e6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, 'https://pelibifir.ru/strik?utm_term=dragon+age+the+calling+pdf', suggests a lure to download content related to 'Dragon age the calling pdf'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pelibifir.ru/strik?utm_term=dragon+age+the+calling+pdf PDF link annotation
    • https://cdn.sqhk.co/xenudipu/fqijLMH/dj_fresh_lockdown_house_party_mix_2020.pdfIn PDF document text
    • http://leyloften.online/best_32_inch_1080p_smart_tv_ukzbtuz.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/jeGugep/92026314973.pdfIn PDF document text
    • http://karnaval.host/in_the_mood_glenn_miller_bandxnwn5.pdfIn PDF document text
    • https://cdn.sqhk.co/donuvoduvedo/ZQWjaja/15250843659.pdfIn PDF document text
    • http://madewithsunshine.com/dirurakoguvinatesigrcocp.pdfIn PDF document text
    • http://chebsvet.ru/cancion_de_selena_la_carcacha_con_letrawvsln.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/3jdgd0N/darwin_s_yearbook_episode_1.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/Hha6Xhg/xolaturumatalivamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_93b7c700581d429aac70cee80f649c2d.pdf?index=trueIn PDF document text
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_f5b41d9fc3224135b2a56f270350b46e.pdf?index=trueIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_55d85226f8d74c09a2ebec14db62a097.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/project_portfolio_management_definition_pmi.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/79146620181.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/whats_long_and_hard_joke.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/acrobat_professional_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/fimejav.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/identity_card_maker_free.pdfIn PDF document text
    • http://ditufadupogeju.epizy.com/c300_coupe_performance.pdfIn PDF document text
    • http://milodip.epizy.com/administrador_de_archivos_motorola_apk.pdfIn PDF document text
    • http://zemoxatovasoga.rf.gd/fotamipawesojirebovor.pdfIn PDF document text
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_10603ed616bb444091b701e60b08d373.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/what_crows_symbolize.pdfIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_9b2b86b431574e5880cf59cad6b1272f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/13035766032.pdfIn PDF document text
    • http://bilopijubebuji.epizy.com/sich_vorstellen_b1.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_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 5236 bytes
SHA-256: d028aac40cd419cae4f427a72e08c5f18f377925ee8e23e5b6b0ceb9db051357
font_01_sfnt_off00010cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD9 11036 bytes
SHA-256: f8316b61326a8512341dc18ac5ac61aec282c4d7ebedb0f3733fb8d871325d36

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