Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb78c8a216928cd…

MALICIOUS

PDF

79.6 KB Created: 2021-04-05 12:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 673d6a908997213555b474679340fbeb SHA-1: 7a9f6997b188c00d01c45c8ed0fcf80aaffc3b49 SHA-256: 1cb78c8a216928cd180011b0cc9924ea7a51583b56b552ede11e4009826dbac9
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including ML classification and ClamAV, flagging it as a phishing trojan. The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or redirection mechanism. The embedded URL `https://baarspo.ru/strik?utm_term=viper+4806v+install+manual` is a primary indicator of a phishing or malware distribution attempt, disguised as an installation manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=viper+4806v+install+manual PDF link annotation
    • https://fikoroviv.weebly.com/uploads/1/3/0/7/130740338/a81bc6ed.pdfIn PDF document text
    • https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/9190780.pdfIn PDF document text
    • https://cdn.sqhk.co/luluzefob/EEgiv1k/superhero_colouring_book_games.pdfIn PDF document text
    • http://bekasopeli.22web.org/say_something_lyrics_sheet_music.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://fanilepitas.22web.org/doxevujodolufodozebumar.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/RBiaUge/super_mario_bros_4_game_boy_advance_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/ivIIBfG/amazon_music_prime_day_promotion.pdfIn PDF document text
    • http://reduslim-ufficiale.website/sabbath_school_lesson_powerpoint4jfhp.pdfIn PDF document text
    • https://mirodogewe.weebly.com/uploads/1/3/4/8/134861862/rifofo.pdfIn PDF document text
    • http://firstdoctor.xyz/chennai_super_kings_team_2020_sponsorsrge62.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/h0Rgfpo/kikarikujexivalesojakig.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/jfij4gd/zesawe.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/dufekifaral/deep_ecology_movement.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/kurarewiwujezinaxir.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/52880136350.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/catia_v5_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/platform_beds_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/altova_xmlspy_2016_professional_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/run_on_and_comma_splice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/gajitotowuvuwiluno.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/bamakoxikapetugaxoma.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_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 5568 bytes
SHA-256: 14464643f3b3682a598414145f4972d553989107f1594253c0fcfdc9a1037594
font_01_sfnt_off00010c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 10724 bytes
SHA-256: b64fed8228b230c7fa2432f4ffd45a1ec0bced0086437558d12eea20c01886fb

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