Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6cf4d68c1886b2…

MALICIOUS

PDF

70.5 KB Created: 2020-11-25 06:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 258c63dde5bdbd54fc38b1e6a9e1fd28 SHA-1: d3225f4af6ab3c23c24673e6f0f636f2a24d53b1 SHA-256: 6d6cf4d68c1886b259360000f99a57af2beccfcf135961c5215f7916d368708c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/strik?utm_term=texas+affidavit+of+heirship+instructions PDF link annotation
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/4edfc2244f3b.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/wovitiku/transformers_prime_bumblebee.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/20710997504.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/bio_data_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0b491d-3cad-442f-a596-5f2d7e0c08b0/korolalugisep.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/54532078209.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/bonetown_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/silanulotefilomojulilafet.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/11216056071.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/bevuvatuvadonu.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/jakowowajapuxewoxewi.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_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 5288 bytes
SHA-256: 4222770a23236ba6a399971af347325db187411cca8085b576b1220be090fbf9
font_01_sfnt_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 10264 bytes
SHA-256: 2a672832f9c1960d821f34a7a377a34d8a17493761ef337cc4ec4f458d20df54