Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0780fded75cc9e…

MALICIOUS

PDF

73.0 KB Created: 2020-12-13 22:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c2e9faad5fb6ba5c289921e928d78c39 SHA-1: d9859219f8512fb03332909aae943c228e36f783 SHA-256: 3c0780fded75cc9ed6b0857c9706498505ee3ec2e44684500d7b98b559a80e2d
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-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://trafffi.ru/123?utm_term=persona+3+portable+social+link+answers+female PDF link annotation
    • https://wimavikuwoj.weebly.com/uploads/1/3/4/6/134698125/7546760.pdfIn PDF document text
    • https://wizamivakujeji.weebly.com/uploads/1/3/4/5/134526499/naxonomepetuvawo.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/6252c3f1-2b7d-4cb3-b90d-0187b26b7774/pezulunexexedovuwuvim.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/weluxiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51fc787-2183-499f-bedb-8408361107d8/gegose.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/wuvopagulug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d816b9-e6c2-449b-9d5b-ce81914f1084/43860411710.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/galaxy_j2_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/9571594847.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/79080739942.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/ontologa_definicion.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_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 5624 bytes
SHA-256: 8c5fc0b605db03369199b0cfe4308b47f6dfcbe45435273c75c76c9fb5ee15c4
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 10468 bytes
SHA-256: a07f0d63b8fda301bb70fc42ed9c692909dba9e39d34908a00ef3ae505080fd9