Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fe65489fd7fc02…

MALICIOUS

PDF

70.4 KB Created: 2021-02-20 22:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5fd2fda819e75143667cb8318622d35e SHA-1: 027b524c383859f95d408bb2b5bdfe09e154afa8 SHA-256: 35fe65489fd7fc029067a232fb53ac7e31d0fbc2c5adad036fee327529949699
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/aws?utm_term=maintenance+engineering+book+pdf+free+download In PDF document text
    • https://cdn.sqhk.co/zevukodixu/cggjhei/mujofim.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/efhiibt/gisawogopam.pdfIn PDF document text
    • http://yazansoft.com/knight_of_the_black_rosen50qg.pdfIn PDF document text
    • http://grenkasalo4.xyz/15269815140t0kpi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475728/normal_5fdeddcf0926e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446174/normal_600503d156ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_602ad219110ae.pdfIn PDF document text
    • http://homebig.space/how_to_apply_splat_washable_hair_dye4ur0a.pdfIn PDF document text
    • http://iranomics.com/nature_sound_message_tone_download8k8x6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5fff0ecf53a75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_602b7ac513025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5ffb3157d2142.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/ehg0iji/diraliribezarig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatomije.rf.gd/search_excel_spreadsheet_ipad.pdfIn PDF document text
    • http://dopamirep.epizy.com/51267881006.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_off0000d625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD625 5444 bytes
SHA-256: ae725ebded80db2b146e7770605cd962e0220bf105d88992d1624492436ef630
font_01_sfnt_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 10564 bytes
SHA-256: 242497419bbc67d167441bedce2380e1d6f57e906e9ddf676e96a3098e62c5ea