Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0dbff8e471d289…

MALICIOUS

PDF

67.6 KB Created: 2020-11-25 04:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 400e32b102c29def7e7e9a3f2220cb68 SHA-1: 18a6f40e8e06f56de38aaf78eee6be54d0f5bf7d SHA-256: 1f0dbff8e471d28941f6dd847745d434081f4861060e39407f0ef1c6bb746be4
214 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lure users to a harmful destination. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=unified+project+management+methodology+pdf In PDF document text
    • https://woxolifufoku.weebly.com/uploads/1/3/4/2/134234665/32ace7cfc12373.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/wupiwupiwot/nifty_e-z_guide_to_d-star_operation.pdfIn PDF document text
    • https://s3.amazonaws.com/mogelebolep/pyramid_plunder_osrs_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/renorogazuxufibowoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0034cc43-c5ee-4a7a-bce6-4b8abcfa680d/81038686587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3679fa4-424b-4efe-aace-073afcd00202/xazebosibakonapeweko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35034398-6a15-4d4e-a14a-f1e4780d6ed9/nomixetobemizovari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6320aab9-de1a-4665-9cad-b45d39f21f08/vakemozagisufise.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/cash_flow_to_creditors_debt_holders_is_defined_as.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ca0d4b-9274-4be3-80ae-cda57384c151/10008982515.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_off0000c7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B2 5560 bytes
SHA-256: 7462494580157189b940881474cc232dfe288e7c4487c578cda3d700b485abb6
font_01_sfnt_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 11320 bytes
SHA-256: 76fc1213b5f3031cbf43565e4d7c24b177bd0cb7a5190939096d3af8d07199a3

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