Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a2ad76d2d9062e…

MALICIOUS

PDF

68.7 KB Created: 2020-12-31 01:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 36fb3cb16330d4f98f1190422e18b58d SHA-1: edc6cb8fa25d19fa4070e1eb6d6d33bccd97a30f SHA-256: 63a2ad76d2d9062e3b76e4ff1770dc7712a043bba083833148fd5efc250f1e14
214 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 large number of embedded links, many of which point to external websites, indicating a link farm or phishing attempt. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://traffmen.ru/123?utm_term=what+does+the+mockingbird+symbolize+in+fever+1793'. The ML classifier and ClamAV also flagged this file as malicious, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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=what+does+the+mockingbird+symbolize+in+fever+1793 In PDF document text
    • https://cdn.sqhk.co/salozudat/CCjdjjk/download_real_drift_car_driving_master.pdfIn PDF document text
    • https://cdn.sqhk.co/sewetotab/bqIAcjf/world_history_definition_of_patrician.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/geHD1gj/oklahoma_lottery_scratchers_scanner.pdfIn PDF document text
    • https://cdn.sqhk.co/pewovixosafu/ja4JJgf/feudal_japan_art_and_culture.pdfIn PDF document text
    • https://cdn.sqhk.co/mefomixut/F1agejD/alienware_aurora_r11_gaming_desktop_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/cjbk6jb/tic-_tac-_toe_family_christmas.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/55364df08209f6e.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/ibIYZo0/30942293969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d88aa4-36ff-4ea8-a1dd-cae30bfead6d/unblock_club_penguin.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/25821461944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d095488-183d-4bf1-9334-c51b56850963/nizor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0674a21b-23af-4019-8cba-7455d5730587/vozakekenedixakixefojew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4765a84-ca6d-4af7-9591-c48d4862fbce/72810434721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53751055-de6f-4e34-89d1-cc94a40edec0/gugujokusurosawinumifimuv.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_off0000cbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC3 6316 bytes
SHA-256: bbb7ee8bed8b52e38189b748d787aa97ab64442079fda2bb0787d88b7a9f4a2b
font_01_sfnt_off0000e146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE146 10656 bytes
SHA-256: 30c134a513286aa7cc8dc473d1e0723f47ee4632780bd1023acdd2a87cde0358

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