Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b36ceb024d6e12c…

MALICIOUS

PDF

89.4 KB Created: 2020-12-30 10:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 376d8e423f1b025611f228e8640db4e0 SHA-1: 65138f117390dd8aa91657d3484a5b8b8329aebe SHA-256: 9b36ceb024d6e12c9ac8af6cc57be5760dc15cae0b9a3576188c92a450d7faad
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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/strik?utm_term=metronome+90+beats+per+minute'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=metronome+90+beats+per+minute In PDF document text
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5fca9eae2de5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_5fa34b78485ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_5fcce2cc46a50.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/penefelomiju/german_style_cv_template_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73bf2c46-b9a3-47f4-b72c-f41c2ea132c4/coordinate_geometry_review_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a774136c-1efb-411a-b6e4-dba95f8a871e/subnautica_sea_treader_path.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/rcog_guideline_on_antenatal_corticosteroids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/061f70b1-4a49-44ca-b197-8fea541a477f/dgro_etf_quote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2774bc-01a0-4b72-a3bc-981141daf051/kasev.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/tilirako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ed1b83-58f1-4d92-9fd4-cd9ce73623d4/deus_ex_goty_weapon_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b28c19-00f1-49c8-a5c8-c0e6aa2e623f/52297898075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c639e9ea-60fc-43b0-ab0d-59e2b75b0628/kuvibezudus.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_off00011e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0C 5376 bytes
SHA-256: f9ddb5f190b2ea732be1d97d2cdf98c97e1b5b4005f5d9fde4467b4c1ed4538a
font_01_sfnt_off0001303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303F 12580 bytes
SHA-256: 6b6b2033a594d60f8fe91829d655ef28ad1e85df126ab4b109401556d8d939ed

Open this report in the interactive analyzer, or submit your own file for analysis.