Malicious PDF — malware analysis report

Static analysis result for SHA-256 433600e6a0c8f3fd…

MALICIOUS

PDF

78.0 KB Created: 2021-03-01 08:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 61f8ee9f085ee36fbeb663917aef883d SHA-1: f077376919a5a6fbb41bfba38347df25831401cb SHA-256: 433600e6a0c8f3fd0917c8bf860b4f4e4870fcf1a3d148cf886c42d33c2c619c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or malicious intent. It contains a large number of external links, characteristic of a link farm, with several pointing to potentially malicious domains. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to external content, possibly for further exploitation or credential harvesting.

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
  • 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://fokemale.ru/123?utm_term=bowflex+xtreme+2+se+price PDF link annotation
    • http://particulieres-societegenerale.best/52220273914vsrup.pdfIn PDF document text
    • http://lofitner.buzz/baptist_hymnal_piano_sheet_musicie19l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455180/normal_5fd17e56c0b07.pdfIn PDF document text
    • https://jixerunoxeza.weebly.com/uploads/1/3/4/6/134678785/guserifawexafix.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/edeaf109e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374698/normal_5ff7e35e48cae.pdfIn PDF document text
    • http://astrology-personal.online/between_the_world_and_me_bookf9cqf.pdfIn PDF document text
    • http://megatorg.ru/what_is_the_best_robot_vacuum_for_carpet_and_hardwood_floorsysz24.pdfIn PDF document text
    • http://bluebadgeform.com/10798004287kqt61.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/lixisariwulo/greenhouse_gases_and_their_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/fusionner_2_en_1_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/bodoni_book_font.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/vunibepor.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/11875004827.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_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 5292 bytes
SHA-256: 0e4e263534762f2b4b5fd4ead450de6a28f67a72919403415c7edfedb9ff1ae6
font_01_sfnt_off000103a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A4 11628 bytes
SHA-256: 75260cab16901429da66969324422e6471a6be5968a9223f0dc75386b623f0cc

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