Malicious PDF — malware analysis report

Static analysis result for SHA-256 5593baf1e2896dae…

MALICIOUS

PDF

68.2 KB Created: 2020-11-21 20:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 15874513cf9eb5e422ae8bf026bc6f77 SHA-1: 9cae95a0234f60a84ad5c2033f1ade164b8f3f35 SHA-256: 5593baf1e2896dae9aa65c94680b449017b24986cebf6af1792eab2a2aeade06
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various websites. One of these links, 'https://traffset.ru/123?utm_term=adamia+therapeutic+repair+lotion', is directly embedded in the document. The presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, consistent with phishing or malware distribution tactics. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=adamia+therapeutic+repair+lotion PDF link annotation
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/4576463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5faa373c85eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425933/normal_5fab0b3bd78d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5fb7c869c3236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f9339c0243cf.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/davawina/7201682733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7320fe-cd34-40c8-963a-b8765e659077/jozujunudedolajamejenek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9333bf3-bd58-442e-9941-55d7da34bbb6/bolafojuvovufuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2bdc40-4a2d-44ee-b7dd-166d0fc8d672/23724622786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b90929-bf01-4c3c-b166-2368449cece7/kaatre_en_vasal_vanthai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6cbde39-cfc6-4b9e-8b39-3dc600320d5c/32941802872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb6ef4b-8a14-4645-b4f4-e27a8f8235de/nudexawikuxoxikaxepazuf.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF37 5124 bytes
SHA-256: 55e8cbbf3692816c4748c209c7b0b1f7282629faf03ed77798ec3ce9371d62ee
font_01_sfnt_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 10348 bytes
SHA-256: a007b8e8c0d5733f20a03ef3b59e2671d332cffe95a29b85a6a12deefb0f28cb

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