Malicious PDF — malware analysis report

Static analysis result for SHA-256 98033ee72b7f8827…

MALICIOUS

PDF

75.4 KB Created: 2021-01-29 01:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 38c2a6edd899c3c2960dec97677e6694 SHA-1: fd469c9a14373f12c2e297fd16bea4a0fb716080 SHA-256: 98033ee72b7f8827819ca01a3698e89c4de66fe49a5bbca5f842375acc79d57e
196 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
  • 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.
  • 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.
  • 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://maypoin.ru/wb?keyword=toolboxes%20for%20teaching%20the%20good%20and%20the%20beautiful PDF link annotation
    • https://cdn.sqhk.co/sozaxejiv/5IygeBd/21232261793.pdfIn PDF document text
    • http://slmit.fun/diamond_free_fire_murah_via_id9yfk9.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/icugcjh/dixumar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc885d9725ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443357/normal_60072ae33d2f2.pdfIn PDF document text
    • http://amin-ukraine.net/achyutam_keshavam_ringtone_download_femaler2o71.pdfIn PDF document text
    • http://violet-cinema.ru/kuginokomuruwofapeq9ght.pdfIn PDF document text
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/vemozemewele-wugije.pdfIn PDF document text
    • http://cactusvpn.live/40859742224sjlx5.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/2KYmkje/icc_cricket_world_cup_live_match_2019.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/boxujetanonikuv/26484735855.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/35336305637.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/14967938150.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/32962300253.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/pablo_alboran_quien.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_off0000e5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 5440 bytes
SHA-256: 0d6a7d1cc2bf807fafe61944df7e44496eb7a8283781f7c64cd77a082d88c9ba
font_01_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 11952 bytes
SHA-256: cbc1a68d01bb4e5d071342664255acf564c5d04eafcb479bbffec6893c2630ad