Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b833ab90f4565a…

MALICIOUS

PDF

64.1 KB Created: 2020-11-18 06:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0937cec71fa8f193ec1402f574447986 SHA-1: 1cca443f69e54292b1c392174da48e0800cb31aa SHA-256: 46b833ab90f4565a7001f4778a55c0dd3853612ffb2afa6e58b5d57bad6d38ac
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, suggesting it's designed to redirect users to external sites. The embedded URL points to a suspicious domain, likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a malicious intent to redirect the user, potentially for credential harvesting or malware delivery.

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
  • 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.
  • 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://trafficel.ru/123?utm_term=stronghold+builder%2527s+guidebook+3.5+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f89204bcca30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f887c113ef47.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/nixitegilamije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f94f6b3982c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fa2f2d1d36bb.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/loponazi-foxigudodal-lerifur-tokiruro.pdfIn PDF document text
    • https://menebunokusup.weebly.com/uploads/1/3/4/5/134588819/tavodefoxefodabek.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/ae45a9b5-0e71-4c9e-9e2c-afed55ab9631/vlc_media_player_apk_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347a69d3-48d9-4de0-8323-276827b394b8/systematic_theology_norman_geisler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed1694a-1c61-43ed-91b5-c0e5d4de242b/nanesa.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/southlake_focus_group_job_board.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_off0000bb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7F 5756 bytes
SHA-256: 0bd40a785c23614b7b8c736fc76812cc00e5b403fa5783b9ea0843690bfa89a7
font_01_sfnt_off0000cf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 10624 bytes
SHA-256: 4ce055b09b8bcca08171c023e55f4451c664b289c583cd0a24891fc239aaf7b8

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