Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4afb503c15bbb73…

MALICIOUS

PDF

65.1 KB Created: 2020-12-31 22:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 112822c312e6d7ae497dfac5853cbaa9 SHA-1: bf87638bf181979657bc0a34245096525a932bb3 SHA-256: e4afb503c15bbb73b0eecd5b29d0e791f6b9e1ecad022f7faa6e12bfbf3cc241
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffmen.ru, which is disguised with a search query related to 'My hero academia'. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The embedded content, though heavily obfuscated, likely serves as a lure to encourage clicks on the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=my+hero+academia+season+4+episode+2+english+dub+funimation In PDF document text
    • https://garusase.weebly.com/uploads/1/3/4/6/134634063/timubabu.pdfIn PDF document text
    • https://vewemojuwu.weebly.com/uploads/1/3/5/3/135392654/6456c76d097b5.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/mewonenubatas_sunifuvumu.pdfIn PDF document text
    • https://cdn.sqhk.co/toridezoxiko/wihEbgg/happiness_lyrics_video.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/hgdghif/dopiwixuruk.pdfIn PDF document text
    • https://cdn.sqhk.co/semobisugigi/jAMi9hj/spider_man_rope_hero_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/erQjghc/stick_lacrosse_goalie.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/f6hhTor/gujilos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fd19868b8243.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/laradusa/zurazuwubukibekadoxekulif.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/which_of_the_following_items_are_plant_assets.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/lawotede.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tevisukovitanajakete.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/51562286371.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/breezing_forms_file_upload_not_working.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_off0000c0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 6036 bytes
SHA-256: ba1edaccfa84ba070d1cb816f8492ecac8b1d09a2b08e8f7e4cc6602899a172f
font_01_sfnt_off0000d574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD574 9884 bytes
SHA-256: 7ce991c2894389eb7e77e55917b718c676b163804dbd5380b348e9661572365a

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