Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a68536defa991a…

MALICIOUS

PDF

67.1 KB Created: 2020-11-28 08:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2ebf3cc8abbbaa293994eae5804b926 SHA-1: 2ec3ed744952a833196029d51bc0e0f30a3cb40f SHA-256: 09a68536defa991a60a2cf4250e97539b917d31aff3692c2bda0dd0f30ce4325
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-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://trafffe.ru/strik?utm_term=anakin+skywalker+kid+slave+owner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450907/normal_5fa29633d0c91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5fb7f9bef0a98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_5fb88b120e63b.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/pudavugufesala.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/3e5ec58d-525e-4ea9-9fae-9ea20f6c3d6d/89399230560.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/dadafopu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/ringwood_public_schools_ringwood_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5551c8-882a-421e-8836-d8eec74794e7/pizenomomugabusibukupabez.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/brown-_forman_corporation_financial_statements.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/ipc_360_camera_app_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e756bbc-f37e-409c-9b39-ebc389a6b1f8/sodizurilo.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_off0000c90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90D 5124 bytes
SHA-256: 3770dfcf214d638009d0a0fd3d742945f415ebb23666ae62ff1ac0e955005cb8
font_01_sfnt_off0000daab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 10944 bytes
SHA-256: ef54ccde93b4235bca61c197dce6d346447806e8f18d65a278c015e4be00e06e