Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67c3f155b069e51…

MALICIOUS

PDF

63.9 KB Created: 2020-12-18 11:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55a44076e1e0177894fffb8511bf176d SHA-1: 53fd47a00a9ec98a9e32304bfadd1c47a09e7726 SHA-256: b67c3f155b069e5182b4499e20fc3028219afa4bd54dd0143b1b0e7aad49b330
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, many of which are designed to lead users to potentially harmful websites, including a known malicious redirector. The file's structure and link farm characteristics suggest it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=about+face+pdf
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fad129aea6f6.pdf
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/vadatalegurarigagi.pdf
    • https://gonedosi.weebly.com/uploads/1/3/4/7/134730609/7866160.pdf
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/a6a9d1.pdf
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/9128563.pdf
    • https://ruwiderok.weebly.com/uploads/1/3/4/8/134891429/3ebf9f5f5a59e.pdf
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/7c69a37df0.pdf
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f9c9f0cb66a1.pdf
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/42fcf7a1088.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/11449207-f901-4dee-8382-5243573fd847/vimox.pdf
    • https://static1.squarespace.com/static/5fc77f8fbcf5f06bcb7924a7/t/5fce4da2c00f007cea17a209/1607355811825/ralekij.pdf
    • https://uploads.strikinglycdn.com/files/d57c257b-44c6-41d5-9f05-dbc1bba3432c/dovuj.pdf
    • https://static1.squarespace.com/static/5fce03dd1d9e1221b0389eea/t/5fd69ef1ab1a676c7298053f/1607900915305/certificate_of_insurance_construction_form.pdf
    • https://uploads.strikinglycdn.com/files/cdec1573-7dda-4fbb-bc9a-a10f10ed986e/seatgeek_customer_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b367.bin
bea395e70225b49216b66622ce8d879f03565fbc472fa2b97ae556bb86deeb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB367 4700 bytes
font_01_sfnt_off0000c368.bin
40303742e3ec66068b35be2d42b9f2b1f20fbb304392f6628c832994dc797936		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC368 9816 bytes
font_02_sfnt_off0000e4ff.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.