Malicious PDF — malware analysis report

Static analysis result for SHA-256 804a173c4e35c81a…

MALICIOUS

PDF

72.3 KB Created: 2021-01-08 10:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d5153395c18c4c4ff0e8f496ef12f0b2 SHA-1: e377e6a481869cca52363320d0a1e87826d13762 SHA-256: 804a173c4e35c81a83d534094d35d3090f9960c51b3a2f873418ae14295a0b54
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Affinity photo workbook' and the authoring application, suggesting a lure to trick users into visiting the malicious URL.

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://trafficel.ru/aws?utm_term=affinity+photo+workbook PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5fddd3262c400.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/C14Fjgf/tusuzobodiwutixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_5f8fff0e407e1.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/hjEuOhf/maybank_ezypay_plus_calculator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fad9c05ac4e2.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/hbghv6E/20438472239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f8c9b9b1c0f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472488/normal_5fb3013c57434.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/donarepemi/32094951950.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/software_per_biglietti_da_visita_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/fifa_442_formation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/marvel_heroes_3d_wallpaper.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_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 4956 bytes
SHA-256: 91aa3d856ed99d35167c603da954f75ccc2d7d8385d63c9863cf7f8c8d082c7d
font_01_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 11064 bytes
SHA-256: 28f09818a566aa1f8ac08bd90640b3b306c918ed265eb7de6dfb708b2a631810