Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d47098de7be271…

MALICIOUS

PDF

94.9 KB Created: 2021-01-13 09:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f18005d547053a437ce35dfaf29f5c97 SHA-1: 9e82f4becd194c59b8be8b7c01d462236973a77a SHA-256: 36d47098de7be27113bcbdcd8d04b7a4f406a7cdfc5db12541654502c9d46fe3
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to plant anatomy to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=anatomy+of+fasciation+in+plants PDF link annotation
    • https://site-1166044.mozfiles.com/files/1166044/corrugated_boxes_manufacturers_in_pune.pdfIn PDF document text
    • https://site-1172743.mozfiles.com/files/1172743/72529152622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5fb6905068395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ffcf92b6bc69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_5f985916cc4b4.pdfIn PDF document text
    • https://site-1180410.mozfiles.com/files/1180410/30782314443.pdfIn PDF document text
    • https://site-1167931.mozfiles.com/files/1167931/tovobapijanamomu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5fa201389a3d9.pdfIn PDF document text
    • https://site-1168114.mozfiles.com/files/1168114/viwusafivozifa.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/laradusa/white_candles_vs_colored_candles_project.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/compliance_certificate_format_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/cunningly_informal_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/49951781435.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/fumogeranotirezasazel.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_off0001343e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343E 5156 bytes
SHA-256: ddb68c7af7eb9935d458877e71debae3db72caab07f21dd54b4b9fc06d941b15
font_01_sfnt_off000145cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CD 13240 bytes
SHA-256: df2fc4b77cc0e6b305782bfcb7660b128e968de8ce44ba3e61d341a32a0db7f0