Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f89939d9775f914…

MALICIOUS

PDF

65.3 KB Created: 2021-01-03 14:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 36da1e63ab36c5391c1fddfc5f5e35bb SHA-1: 387853a8f0fcbd897ac5c383619dce212c127c97 SHA-256: 1f89939d9775f91433c8f4c927743a9404c5524385d8aa4f60c94be0a49efc3d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/aws?utm_term=ardas+kran+all+song PDF link annotation
    • https://cdn.sqhk.co/pemejurove/cjciiLt/73446712852.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/3331845.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381539/normal_5fdd047679573.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/TLURkWn/descargar_monstercrafter_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/jhcjxem/fedopikigidoz.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/c85b3602-7434-4543-b394-9a71c08a0dc6/things_that_start_with_grand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962f50b3-97f0-4cf6-a870-071ce5e155c3/suzevanije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c79475-89a5-46d8-a46f-1a4c6726fd73/vebum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fa692e-a212-4aeb-b0aa-2dd8e6252827/matalojatufogevasafuguvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff9f1d9-2b3a-438a-a235-38fd7a01fc9b/40460829865.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_off0000c0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C9 5044 bytes
SHA-256: 8c0d51324c90cf920c8c2454c94eaca73c943805c604cb801bc3cd70b25a313b
font_01_sfnt_off0000d200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD200 11604 bytes
SHA-256: 24dcf127d000c9237ac7f9f456cc1732b42cb47f779e883aff9f78123e22de98