Malicious PDF — malware analysis report

Static analysis result for SHA-256 a412db4f35d2f967…

MALICIOUS

PDF

89.1 KB Created: 2021-05-13 21:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c3fece517a0de829fc52ce12fd32fa55 SHA-1: 740f2a852d37a0ab8cafeb697db7a1b4ff7275e6 SHA-256: a412db4f35d2f9677a67f5b047b4c5269407c192ae97234005bd4c3328a5353a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, including a link farm, designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, suggests a lure related to using an iPhone camera as a webcam, which is a common pretext for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/strik?utm_term=how+to+use+iphone+camera+as+webcam PDF link annotation
    • http://myfavoritesun.xyz/pepirafonuvuwcn8tu.pdfIn PDF document text
    • http://tb-films.ru/wuriza11ap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446374/normal_602801d7e7d10.pdfIn PDF document text
    • http://reawont.online/kamikaze_all_video_song5fsr5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446914/normal_5fd9ba81c798f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_6048604bdff69.pdfIn PDF document text
    • https://tavebesu.weebly.com/uploads/1/3/1/3/131381332/369dda4903e15.pdfIn PDF document text
    • https://lufuroxula.weebly.com/uploads/1/3/1/4/131408913/83080d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491705/normal_5fdf54cf9af40.pdfIn PDF document text
    • http://parralax.net/galaxy_wars_fighter_force_mod_apkf0x5i.pdfIn PDF document text
    • http://rimka.xyz/tomojepufujqs6fq.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/vafusitezagemuroduxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lixisariwulo/is_hunger_games_catching_fire_on_hulu.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_42d3a943712442bf8e50c2ac09aafe32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/what_is_a_strategic_leadership_model.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_2635a89537b84f4db18c065005840b28.pdf?index=trueIn PDF document text
    • https://190d602c-e74a-4ea1-b1d2-d722d7947d0f.filesusr.com/ugd/1eddd4_308c777eb31541658c432abad1e78156.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/83783492645.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/goxalu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/18305746759.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/adding_dissimilar_fractions_worksheets_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 5216 bytes
SHA-256: d11ac053919c0c7026233aec0399ce36f53a6ee6827a15cd7718ab2b8010763b
font_01_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 2208 bytes
SHA-256: 6feae600816abf1bc5af351fc67f77c29147a154af04638e5d7145d083d074dc
font_02_sfnt_off00010c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 10980 bytes
SHA-256: 4f425ace43a2d9773d066b2e85d523b72649ae9cdaca420c5cad8d5a5704a012
font_03_sfnt_off000131d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D0 16700 bytes
SHA-256: 13ff4ef8b510922a3baea655845d1c9b2abcd4b073570e69f31d56562042fe53
font_04_sfnt_off000147df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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