Malicious PDF — malware analysis report

Static analysis result for SHA-256 35cf92f50d36b568…

MALICIOUS

PDF

76.5 KB Created: 2021-01-17 11:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0082be685818669ef3f6564f9cdafc82 SHA-1: 7348e405f381f044c7f66e14352024317841bbc9 SHA-256: 35cf92f50d36b568d5ec45d49a795dea3e6f823666457f86aae7c29c5b1dea2d
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains multiple links to known malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the URL https://ggtraff.ru/aws?utm_term=boomerang+cartoon+app+android as a malicious redirector. The document also exhibits characteristics of a link farm on disposable hosting, suggesting an attempt to distribute malware or conduct phishing through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?utm_term=boomerang+cartoon+app+android In PDF document text
    • https://site-1166620.mozfiles.com/files/1166620/best_homeschool_programs_in_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/jdb1jeh/infection_control_training_certificate_free.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/hjI7gf6/wevulimupigemevamufud.pdfIn PDF document text
    • https://site-1168448.mozfiles.com/files/1168448/implosion_apk_obb_completo.pdfIn PDF document text
    • https://site-1178547.mozfiles.com/files/1178547/pojuvanavipedofoganuzufu.pdfIn PDF document text
    • http://xinupavob.iblogger.org/19908497210.pdfIn PDF document text
    • https://site-1177769.mozfiles.com/files/1177769/bootstrap_image_editor_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/vjehdTA/soviberur.pdfIn PDF document text
    • https://site-1172540.mozfiles.com/files/1172540/game_rooms_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vozofugova/ja6geii/can_am_defender_hd5_problems.pdfIn PDF document text
    • http://jesiwufap.iblogger.org/fegawemabivilobukodel.pdfIn PDF document text
    • https://site-1171454.mozfiles.com/files/1171454/disable_auto_top_up_ez_link.pdfIn PDF document text
    • https://site-1171851.mozfiles.com/files/1171851/35894412207.pdfIn PDF document text
    • https://site-1178069.mozfiles.com/files/1178069/endless_love_sheet_music.pdfIn PDF document text
    • https://site-1173857.mozfiles.com/files/1173857/taza_grill_southfield.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
    • http://lejokadedemixo.rf.gd/watercolor_brush_ai_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 5020 bytes
SHA-256: 314e5f69c4826bf3a1fad4476d46480d7b58e73290718c41f61c598d487fbe6c
font_01_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 10484 bytes
SHA-256: ffb919c30b9b9ca5e76302989bab30d0a3fbecab830675bca3f211e03064d1a8
font_02_sfnt_off00011734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11734 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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