Malicious PDF — malware analysis report

Static analysis result for SHA-256 349bf5059f7073e1…

MALICIOUS

PDF

84.8 KB Created: 2021-03-29 16:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e1007747d28c9affc5f6b386dbf0089d SHA-1: 5aa19de7043c33161c267b9a2ed26092d868b9b8 SHA-256: 349bf5059f7073e17e36fa8fb43233ebb89a685a216973fc9960b9535044e26e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://ponafet.ru/strik?utm_term=oral+b+pro+1000+vs+1500 PDF link annotation
    • https://cdn.sqhk.co/dubikureta/hiVwigK/educhat_app_download_for_pc.pdfIn PDF document text
    • https://saxenivimagi.weebly.com/uploads/1/3/0/8/130813604/2643133.pdfIn PDF document text
    • https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/9183b72189efdb1.pdfIn PDF document text
    • http://specrazreshenie.com/guxovotawimoxiluwakiurw8e.pdfIn PDF document text
    • http://doweryklkq.space/tiniruxikefebzylhk.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/icJggjj/kipabirulivulewaso.pdfIn PDF document text
    • https://gipavibipo.weebly.com/uploads/1/3/4/6/134654588/desesona_toroboxese_febonuril_dapojor.pdfIn PDF document text
    • https://waguxezemi.weebly.com/uploads/1/3/4/7/134703223/9412371.pdfIn PDF document text
    • http://hookup157.online/deed_of_variation_template_freeustin.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://uploads.strikinglycdn.com/files/0cfaf3d5-fb2d-4a32-99f0-325ac53eac3d/goat_simulator_xbox_one_achievements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39fd393-e8b8-4ee7-9642-a5b2148b819d/17106226126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8495c15-b788-4365-bd6d-0fd6991238c4/canon_speedlite_430ex_ii_price_in_bangladesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4bb99c-6682-47d7-8403-6e82659672e2/kajadome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1ccd17-856d-4862-991a-f5778e1775b9/59122565665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2b0cdc-5b8f-4cc0-a356-9c965b06e603/best_keyboard_case_for_kindle_fire_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971792a6-2b6c-40d4-a78f-60c71bd8c49a/warrior_cats_books_series_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b052fd81-cfde-4758-906d-774345a2d6f1/microsoft_project_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a05043-35d5-4734-af97-ef35d73ef7f0/tozifafibudomexud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3550bb-77d9-4748-a421-c5a7cc7e67cc/human_fall_flat_online_pc_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92513ed-999b-48c7-a895-c180eb605fb1/overseas_internships_for_college_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d0a6a4-e433-4c22-8750-c72d9a57f463/kumajibifubuz.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_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 4796 bytes
SHA-256: 91a660ead752272f6c8aa3ec9ffe5abb74743d67591f8a6a8088e5cad86fea1c
font_01_sfnt_off00011244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11244 10996 bytes
SHA-256: 14d8fbbaf081a41667349d238ab71c0c73fa06d8deeed0dde72c4f6628c15291
font_02_sfnt_off000137e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2