Malicious PDF — malware analysis report

Static analysis result for SHA-256 86171d6c8d752d71…

MALICIOUS

PDF

100.5 KB Created: 2021-02-16 08:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b5d23accd76228e382bc47afe9bbb51f SHA-1: 405b280723b458724086983d672f59acfca1f6fd SHA-256: 86171d6c8d752d71cf394dfabef04f2b5045d9e5f0ec996e729e33a71cdf2a6d
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://crophysi.ru/wix?keyword=wind+waker+hd+cemu+trainer'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=wind+waker+hd+cemu+trainer In PDF document text
    • https://static.s123-cdn-static.com/uploads/4454041/normal_5fee373ae494e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450243/normal_5ffbaec2dc35d.pdfIn PDF document text
    • http://bonboxstudio.com/label_design_templates_online4iynr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_6011b7275f6df.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/hhggjhb/photo_collage_ideas_pinterest.pdfIn PDF document text
    • http://samoe-samaya.ru/3229049130090nfi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fc7a38c29a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_5fdb33a3443e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fea35ebd2b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_5fe61ef823111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_5fdb5eb619b46.pdfIn PDF document text
    • https://cdn.sqhk.co/zotiperugi/9gchdma/74901184494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_5fe714db03e69.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/ifigdgd/retro_video_game_reviews_youtube.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/daniwodug/suxoken.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/rapupoletidi.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/71144935361.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/90095215051.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_off00014308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14308 4912 bytes
SHA-256: 15e0695c6f4aaee541a26840a7911b59170453707d46b07355eafbb26f73f264
font_01_sfnt_off00015394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15394 10568 bytes
SHA-256: 265b4d711887d109bfcf1cabbfa6581e0b78ebe1cc66b266ed312718466d4686
font_02_sfnt_off00017694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17694 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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