Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a83c6834726aebd…

MALICIOUS

PDF

60.1 KB Created: 2020-11-14 14:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 582ef6f1abfe5b48c2d4f2babed11a56 SHA-1: 9639814207be0a260071dcde7b812793054040c7 SHA-256: 6a83c6834726aebdc6e569aa0791d994f9adfeef9a061de74d112d00f9728ac7
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 0.9995

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://traffking.ru/strik?utm_term=combat+tournament+legends+download+pc PDF link annotation
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/7637255.pdfIn PDF document text
    • https://wizamivakujeji.weebly.com/uploads/1/3/4/5/134526499/c4619ba701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5f926200ed320.pdfIn PDF document text
    • https://jodiwovuf.weebly.com/uploads/1/3/4/3/134368652/f6766e26255f74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478141/normal_5faec1a38f348.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/gaxuremewuger/bofomejeri.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/potixarejoxevat.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/nemerakiwunugixazuriboneb.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/buponos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21eecfc9-d522-4780-9bc5-05cdbbd183e3/80140522590.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/budgetary_slack_journal.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_off0000ab5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5C 5532 bytes
SHA-256: 51eaa240a1c7bf150cffc0e129af280d5794be8a3e049a3f5fc108659ba70e3e
font_01_sfnt_off0000be18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE18 10464 bytes
SHA-256: 2b456b0a9fae10d2fa3643b7a626561c89d0b1eb914ea8cc21675c57342968fd