Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6bcaeffef3e1a0…

MALICIOUS

PDF

85.5 KB Created: 2021-03-18 09:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d8d53d5f510c0bcf73c355c8cd298da SHA-1: 1debf807c25de5cd7e482147e6eab553d90e2734 SHA-256: cc6bcaeffef3e1a0b1d66fd7e1b95570462a502355582bdd8fc2d67948b9638a
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, identified as a PDF link farm. The document body, though heavily obfuscated, contains references to 'Chrono trigger ds dimensional vortex walkthrough' and authoring information suggesting it was generated by wkhtmltopdf. The presence of multiple external URLs, including suspicious domains like 'jumiwimov.ru' and 'xosijitede.22web.org', indicates a likely attempt to redirect users to malicious or spam content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=chrono+trigger+ds+dimensional+vortex+walkthrough
    • http://xosijitede.22web.org/proportional_relationship_equation_worksheet.pdf
    • https://cdn.sqhk.co/bubiwalifeda/7gdgggf/7712723391.pdf
    • https://cdn.sqhk.co/tunuravaxoxi/2VUU5HY/20316673523.pdf
    • http://jixagosetevef.22web.org/7881274093.pdf
    • https://cdn.sqhk.co/xibetevoxaj/hgimijY/download_game_gx_motors_mod_apk.pdf
    • https://moxigowa.weebly.com/uploads/1/3/0/8/130814106/9a7982bac5ee12.pdf
    • https://cdn.sqhk.co/pategazikiw/d6ggF71/block_story_free_ios.pdf
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/nikiw_nitabofezuvu.pdf
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/sofifepoma.pdf
    • https://cdn.sqhk.co/resilano/ljeMytO/faith_family_church_canton_ohio_live.pdf
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/levizagujoz.pdf
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/8577403.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c9482401-a712-46e3-b0f8-39a80445c707/bemidukuxixel.pdf
    • https://s3.amazonaws.com/zedilegol/21_day_fix_vegetarian_food_list.pdf
    • https://s3.amazonaws.com/minabiwa/iiit_hyderabad_placement_report.pdf
    • https://uploads.strikinglycdn.com/files/d22eeb47-2070-4b7d-a59c-b171c2da7d50/vibewadinepovirakefujel.pdf
    • https://s3.amazonaws.com/vixuwogetiv/madexovukedilufo.pdf
    • http://webekilijonelew.epizy.com/monkey_wrench_answers.pdf
    • https://s3.amazonaws.com/falejogajir/88411425025.pdf
    • https://s3.amazonaws.com/jadudusujuje/adekunle_gold_damn_delilah_song.pdf
    • https://s3.amazonaws.com/xiwevitox/best_editor_app_for_ipad_pro.pdf
    • https://s3.amazonaws.com/rovuweraja/fibusaganefuderudosatep.pdf
    • https://uploads.strikinglycdn.com/files/3ca9e556-251d-4e8c-996c-cbb2543d7fbf/falovuzimapoxo.pdf
    • https://s3.amazonaws.com/vapite/analog_multimeter_manual.pdf
    • https://s3.amazonaws.com/kotenu/12998733725.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fd9.bin
1145ec0eba05c84ee70b4fccbc9c7d91e580bcc1ae2144d314b78008bc759ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD9 5428 bytes
font_01_sfnt_off00012233.bin
62414843f820b07efd4d3572f6a947beb24676a902f906feec767bf448fcc420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12233 11168 bytes

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