Malicious PDF — malware analysis report

Static analysis result for SHA-256 3502429f777c480d…

MALICIOUS

PDF

66.7 KB Created: 2020-12-20 20:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6daf1e8f2a8b5ecbe57f9c54dc7e97a SHA-1: bbccc8d3b0306e0602411501339127ce4e5e9cde SHA-256: 3502429f777c480d851bce17862a00b63b0ef140ee2ca06447bec2e514352406
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection scheme to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs point towards an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=psychsim+5+neural+messages+answers
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdf
    • https://zinixukugezevul.weebly.com/uploads/1/3/4/6/134612333/333614.pdf
    • https://wazeketarawowaw.weebly.com/uploads/1/3/4/5/134587567/gebaritexiz.pdf
    • https://sizunevasiwi.weebly.com/uploads/1/3/5/3/135310428/xiguwunajafageju.pdf
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/8d51d62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c0e01f5a-4b32-4717-b54b-09ddd0929b68/osrs_mutated_zygomites_location.pdf
    • https://uploads.strikinglycdn.com/files/3940e633-ac31-47bd-9529-4ee6a5cffa62/netflix_account_generator_apk_2020.pdf
    • https://uploads.strikinglycdn.com/files/9817aa83-9a87-4efa-b995-1e3af1025609/sullivan_college_algebra_9th_edition.pdf
    • https://s3.amazonaws.com/nerugiraxura/bone_density_and_osteoporosis_worksheet.pdf
    • https://s3.amazonaws.com/jusagi/great_grammar_semicolons_and_colons_answers.pdf
    • https://uploads.strikinglycdn.com/files/7ad70aa2-8808-4eab-9893-ef7cbdaceb6f/kanye_west_late_registration_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e0.bin
31c56abb6b7e943e0d3e2be4cf0527ba08f6794d22a01d94daf54ebcd880d245
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 5532 bytes
font_01_sfnt_off0000daa1.bin
988e25cef573b6a5538a0a2facb267001294477f9a7bc1c50a671cda35f43b10
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 10448 bytes