Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec0e30deeb517f0…

MALICIOUS

PDF

71.2 KB Created: 2020-11-24 13:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8e35b9176eed2b07979bbfc220037b0b SHA-1: ffd6fb9a234753cb8912495415fc170ddab4856d SHA-256: 9ec0e30deeb517f0e7fd07216939fc8018f93a232a549375a7190be0babea02e
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. One of the primary URLs, 'https://trafftec.ru/strik?utm_term=richland+county+sheriff+department+arrests', appears to be a lure for users searching for arrest records. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=richland+county+sheriff+department+arrests PDF link annotation
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/norigixepurun-jenubak-lifesowojun.pdfIn PDF document text
    • https://sodejokare.weebly.com/uploads/1/3/4/3/134349501/6129514.pdfIn PDF document text
    • https://nokurujifeseg.weebly.com/uploads/1/3/4/3/134355409/20db147139651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fa1e36-7725-4469-8370-acda7723c17b/neleledawoxivilifibir.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wikikanokudifarusiton.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/pubigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805397eb-d8f3-4e21-b872-d99f9f25a22e/77365260106.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/zoxogefaloni.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/applied_mathematics_for_bsc_it.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/nbc_sports_5.12.4_apk.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_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 5504 bytes
SHA-256: cf161424ac20db714c88a2be84074c991b389739dd60a68b36a472bdc7fb60d1
font_01_sfnt_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 11732 bytes
SHA-256: 6b03b00888c8468c9a31794cd88cc3117c82b638e0cf55e871c03a4a77408213