Malicious PDF — malware analysis report

Static analysis result for SHA-256 979fe4e0193da408…

MALICIOUS

PDF

70.0 KB Created: 2021-02-28 00:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b21be1b1e96882eee1cf06d592e6d2f4 SHA-1: 40c93a7c9862e447fcaf01dad4ee46511c06f1a3 SHA-256: 979fe4e0193da4083ef2148ce281cc3f43cb616d3b2a1549a8bbd5d15e1208c3
194 Risk Score

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=conduction+convection+radiation+worksheet+pdf+with+answers In PDF document text
    • http://runaxok.iblogger.org/buvurikikusugofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_601ff19f7e550.pdfIn PDF document text
    • https://vulesavub.weebly.com/uploads/1/3/6/0/136095957/a447f6383.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417308/normal_600446f11a488.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420222/normal_6007d45c3306a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_603540ee8ca31.pdfIn PDF document text
    • http://juwatorota.22web.org/guvefenepozidamoxexafup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_5fc761414e6ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443801/normal_5feb9c09869c3.pdfIn PDF document text
    • https://fazajamol.weebly.com/uploads/1/3/2/7/132740605/funosegitinejig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458634/normal_600b5434a15e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447885/normal_5fedc006ed4c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fc9fb1d20084.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/a9993b935912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_5fd1b9eaa29ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fcce9f91f739.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejoluxukoso.rf.gd/20604637293.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_off0000d6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F5 5332 bytes
SHA-256: 05a7463bf88e2294e1b9841dbc2a5dcf5a8ce463fa5d7d871be93005f1927924
font_01_sfnt_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 9696 bytes
SHA-256: 68623221112ebf40d03a7c62c270f744f3d39b07341ca6987c6e91cef0e55290