Malicious PDF — malware analysis report

Static analysis result for SHA-256 61199ce5125a5766…

MALICIOUS

PDF

75.6 KB Created: 2021-01-15 15:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 39fa7a577a6e52355c5c49ccc9a6b856 SHA-1: 16c1a426db09340adcaf08c25f23eeeb6e4a6a78 SHA-256: 61199ce5125a57660d0651c2428e0ffb3d1c39412f470ae5b8a6169243ff4db9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=balada+de+los+dos+abuelos+analisis'. ClamAV also detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier strongly flagged this PDF as malicious. The document body appears to be malformed or heavily obfuscated, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=balada+de+los+dos+abuelos+analisis In PDF document text
    • https://cdn.sqhk.co/xafiguzi/jjfxhcG/mild_steel_square_hollow_pipe_weight_calculator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5fae6d68ba8e6.pdfIn PDF document text
    • https://site-1166670.mozfiles.com/files/1166670/dodizapozudipe.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/ajgfmba/playstation_vr_game_shark_attack.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/jgjhjhT/smart_measure_pro_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5faab3452c4ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5faf0c67649d1.pdfIn PDF document text
    • https://wadasowodasi.weebly.com/uploads/1/3/5/3/135316150/lufom_woson_pufif_sexabid.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/pazatuv/writing_a_cover_letter_uk_template.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_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 4912 bytes
SHA-256: 29b9bfb7cbbc3dfc682c78126e0505ed0da91e70cfbef88bc62f1753944bffd8
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 11552 bytes
SHA-256: 3836da8d733533081b571bfef908866f4bd7340032791b03abb45b78e0f8b357