Malicious PDF — malware analysis report

Static analysis result for SHA-256 94027c152841fc9b…

MALICIOUS

PDF

69.0 KB Created: 2020-12-01 21:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af84d0e27bf65992131232810e398e9c SHA-1: 62537b7da933f75f1ca80e6a5b31b2b717ae6a96 SHA-256: 94027c152841fc9b160da0cd7939a625450f5b4b33421a23d37d941119b17726
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 0.9998

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/strik?utm_term=granite+top+dining+table PDF link annotation
    • https://gogipemefa.weebly.com/uploads/1/3/4/4/134471158/zajoxeluvebefezukeb.pdfIn PDF document text
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/1221844.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/8149106.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/wobajoxa_mesivijakegew_soremax_gifezu.pdfIn PDF document text
    • https://povelelowu.weebly.com/uploads/1/3/4/3/134331265/9649806.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/jiluvobawi.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/734336.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/sugowubuf/65338458379.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/phones_for_seniors_verizon.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/ontario_40_hours_community_service_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/kill_this_love_flute_sheet_music.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_off0000d19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19F 5120 bytes
SHA-256: e48fd4f8bd75bdca46ad75964896f9ea1a262db8fe34be7871d268de61c174b1
font_01_sfnt_off0000e316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 10560 bytes
SHA-256: abae5e03822b69578b690d5ea1c5ee5267c99af50336202b3b90c5ca4b519de0