Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea65855f11afcd4…

MALICIOUS

PDF

94.8 KB Created: 2020-11-16 21:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e9722f7dc173dea1bd17a6ed9047aadb SHA-1: c5856886773b98a14aeb22ce0ba5759611ff2b55 SHA-256: dea65855f11afcd40af27d633f7a045ba5254d3274df9d862fbc2e51adc5836c
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm and is flagged as malicious by ML classifiers and ClamAV. The embedded URL points to a suspicious domain, likely used to host malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=kenwood+dnx9960+manual PDF link annotation
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.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/lupuvogotog/present_cm_of_indian_states.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/electrochemical_capacitors.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/pandora_app_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/haier_8000_btu_portable_air_conditioner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/79161102831.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/word_genius_a_curious_app_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/data_structures_and_algorithms_in_python_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69aa3a9f-d820-4920-91ab-50ac470b71c1/lolopiwoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/chess_online_2_player_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/23905117027.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/cayman_islands_tax_information_authority_tia.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/70352324585.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/jarenikifixaze.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_off0001377a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377A 5276 bytes
SHA-256: ec14e9bbed0f6d59250fa575d3e8f1244bd3ac80afd26082a68a50a51e4e3d7a
font_01_sfnt_off0001496f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1496F 10872 bytes
SHA-256: 98fcb12db4e32ae40d63749d7bfe688bc45eb9712eca3155a00c80a87beba025

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