Malicious PDF — malware analysis report

Static analysis result for SHA-256 d112c1621a926ecd…

MALICIOUS

PDF

70.8 KB Created: 2020-12-30 00:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2cd94fa9a4ec7721c501e6f3d5c62ec5 SHA-1: 7922e56167810d6783a266dfe3dfbe6649f94379 SHA-256: d112c1621a926ecdc4bb87a5726027a23e0c98a63b35cdeebb6e1612240cc56c
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, with heuristics indicating it functions as a link farm on disposable hosting. One of the primary links directs to a known malicious redirector, and the ClamAV detection further supports its malicious nature. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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://gettraff.ru/wb?keyword=wyze%20camera%20app%20for%20android In PDF document text
    • https://cdn.sqhk.co/nopawuwam/P2jjJIe/magic_snake_toy_how_to_make_a_ball.pdfIn PDF document text
    • https://garaxawodipadi.weebly.com/uploads/1/3/4/5/134595678/dcc2b6.pdfIn PDF document text
    • https://fosozenasavo.weebly.com/uploads/1/3/4/8/134889966/dc4e482c00375e.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/forepakizebewilep.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/f5ca19273.pdfIn PDF document text
    • https://tumofevex.weebly.com/uploads/1/3/2/7/132710745/3338979.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/wudibirewuduto/eg_industries_berhad_annual_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9b09f9-790a-46c8-99c5-5aa9fb590674/ginebub.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/logo_guideline_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ba8d61-7b85-43e2-b38b-1a1a16b60d8d/happy_wheels_full_game_unblocked_at_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c899550c-81f7-4fbf-80e3-3a4830476dfa/penakopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07405d98-f124-4fc0-a3ed-7b0308ed3bed/74051082098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c6414f-4178-4d5c-b0c9-931ede6616fe/sekedixepoxorituguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b586757-a4d0-4bf7-bb51-c84fed901212/6-9_practice_skills_rotations_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 5256 bytes
SHA-256: febe0fb786ce602e2e28939e2297b40d8ceb1802d613b3eb4ce023038df8602b
font_01_sfnt_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 11060 bytes
SHA-256: bd1ae3289c1fc4ed4e38c412ea3b482b49859c62b0f9c915b04937757341c6d1

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