Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ec577e4945d117…

MALICIOUS

PDF

71.5 KB Created: 2021-01-11 17:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b16a1a198b5a44426b1e1aaf41ab50d3 SHA-1: 8b6528c6cfc75286c5f6d19473347e56ac150f02 SHA-256: 26ec577e4945d117fb48141a3b63ef35da92d63d975ee47f1a507b8744eeb688
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is designed to lure users by appearing to be a manual, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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
  • 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://ggtraff.ru/aws?utm_term=scheppach+basa+1+manual In PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/nororo.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/4644620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f91dafbeafe6.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/7e8ac5219bed.pdfIn PDF document text
    • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/wezuxeb-fadizu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/6701733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/problem_solving_skills_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/christina_aguilera_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/26056965048.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/jurassic_world_alive_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/problems_in_mathematical_analysis_kaczor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD30 5016 bytes
SHA-256: 66245d59a097de9d3c80d8fd552b51d08eeabb5d1e6b88afe38767af33e2eeb9
font_01_sfnt_off0000de10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE10 11000 bytes
SHA-256: c8452ca7d817d32b3f1369d51f565bab93f9dcf6c3901cf2eeb5cce68a32b7c1
font_02_sfnt_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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