Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02d5c35670d0d25…

MALICIOUS

PDF

70.0 KB Created: 2020-11-25 02:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ca1716a17ab88337f9cde2a7347e1b36 SHA-1: 77d3e1fa68e925ec248885566178d15b9e0359d2 SHA-256: e02d5c35670d0d25ea82a2c5942f562702e7ba4e58798d8be6c9b34a951fd790
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://trafffi.ru/strik?utm_term=trader+joe%2527s+tea+tree+tingle+shampoo+reddit', is likely a phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=trader+joe%2527s+tea+tree+tingle+shampoo+reddit PDF link annotation
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/732c295b5e6.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/4540948.pdfIn PDF document text
    • https://rofowijajexer.weebly.com/uploads/1/3/4/4/134476616/jerede_kekejaberam.pdfIn PDF document text
    • https://fizakilugoleji.weebly.com/uploads/1/3/1/4/131438405/f5bb35d255c76.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/fagezavisowego.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/vuraradaso/assistant_accountant_cover_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7faf25-fa8e-45f8-b831-2a05af026a41/ark_how_to_download_survivor.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/pefozegepesogu.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/breviarium_romanum_1961.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/kuzodivujavirej.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/characteristics_of_mr_jones_in_animal_farm.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/268297213.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/dizezukuwufuzubaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae373b0-68fd-481a-abb9-efe97f0f844f/download_autocad_2020_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/aisha_winx_boyfriend.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA8 5432 bytes
SHA-256: 176f06a01a7b0bb851bacd69efc8aa174941cea5b35800483913a4c42f6c629b
font_01_sfnt_off0000d000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD000 10444 bytes
SHA-256: bf1c3e4594a20ffc2fc96cd2f01435984deede87e28fe8b298c23f6f861fe0fd
font_02_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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