Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3b96632fa6205e…

MALICIOUS

PDF

68.9 KB Created: 2021-01-06 21:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 940beaf163c79b896b58e4c82bb20007 SHA-1: 92eb767db034563691e342d26502a90eeb9a7497 SHA-256: 0b3b96632fa6205e716769516f26ec883039068c19a5a1c8215c7d89eb7a06bf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains references to 'Fast and furious 9 hd', suggesting a lure to attract clicks. The presence of a large number of external links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=fast+and+furious+9+hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcbaed0ede3b.pdfIn PDF document text
    • https://regenapewafixun.weebly.com/uploads/1/3/4/3/134364718/maxatemav.pdfIn PDF document text
    • https://fajimidisuwa.weebly.com/uploads/1/3/1/6/131606183/durewojatusuj.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/G9idTkf/bmx_bike_racing_games_free_online.pdfIn PDF document text
    • https://dobojadu.weebly.com/uploads/1/3/2/7/132711966/vebetegiv-wuwijediroxa-dafube-bifubire.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/3X6wfha/67650533107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fcb6539bf36f.pdfIn PDF document text
    • https://gigomafokat.weebly.com/uploads/1/3/4/7/134717504/6800268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5fe4933538508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501810/normal_5fdfa508b95c1.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/pusixa/visual_studio_2017_format_code_c.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/the_cell_cycle_and_cancer_lab_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/dp_world_mundra_berthing_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/5745662188.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_off0000d26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26A 5072 bytes
SHA-256: e0c441267a338fd0c82fed219af7b885a6c70e6c700d1fed17b37a3ae76b1504
font_01_sfnt_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 10324 bytes
SHA-256: 62a657dc29838ff276e56cf5f0e4876448fc23ae7862e030478911b3685e16c0

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