Malicious PDF — malware analysis report

Static analysis result for SHA-256 3190709887b6260d…

MALICIOUS

PDF

68.3 KB Created: 2020-11-13 08:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e632929479df113123422097b31df63 SHA-1: 270d09f8571305282af5ff3b1736ce6b90c3e208 SHA-256: 3190709887b6260d643a07c61f90fedb28bd5248b9c9156dbe5b6e590a1f3e42
164 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. It uses an urgency-based lure. 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 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=rainbow+dash+jar+project PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5f973dc1618dd.pdfIn PDF document text
    • https://bekonerotukabi.weebly.com/uploads/1/3/4/3/134366377/739e088c8fda0.pdfIn PDF document text
    • https://rofowijajexer.weebly.com/uploads/1/3/4/4/134476616/berigu.pdfIn PDF document text
    • https://safusubugem.weebly.com/uploads/1/3/4/6/134609944/6545311.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/bulozor/13237324241.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/buvap.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/actos_de_comercio_del_derecho_mercantil.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/lizekasagabiwefevifepa.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/jezowasesanonetaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/imperial_cooking_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/besidotumewozilomas.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_off0000c2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AF 5444 bytes
SHA-256: f7cf352c43aab01d722fae6a70f989146c6767bb7ad11e5a599f6f1c7dc49672
font_01_sfnt_off0000d541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD541 14952 bytes
SHA-256: 46477fbbe284257bc08a13ff4a912c4a24da9f93b64705080c966409a97ac1c6