Malicious PDF — malware analysis report

Static analysis result for SHA-256 e170842f27d4f68b…

MALICIOUS

PDF

60.6 KB Created: 2021-02-17 23:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a947d0b7c8a8cb8918eabd000b2fa9ea SHA-1: 4f5806742ca6c2da0aa927bcfe7b9beca72a4fec SHA-256: e170842f27d4f68bb96d8b4e12430f027942997f72ef982e67c386fa1dcd0a4b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=text+file+png+icon PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459469/normal_5fce8a9a653a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5ff1bb784569f.pdfIn PDF document text
    • http://wekabamile.22web.org/wukedodoliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_600fc56d1506d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_600edc09160cd.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/vupatisuso-daginafebiwi-jitavawuwu.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/baxekojojexusol/aruba_networks_licensing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/xotedig.pdfIn PDF document text
    • http://bulujulu.rf.gd/zawudaj.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/sokowutawan.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/vaaste_hd_video_song_pagalworld._io.pdfIn PDF document text
    • http://bozumux.epizy.com/pressure_gauge_calibration_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/55363557844.pdfIn PDF document text
    • http://vosujepagukag.epizy.com/whatsapp_dark_mode.pdfIn PDF document text
    • http://jogupasowedeni.rf.gd/mitufilewevur.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_off0000b4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CA 4716 bytes
SHA-256: 5f8a85c0e832e56dba9394caeb0030714cd4a011848cabdc6c09e889717b632b
font_01_sfnt_off0000c505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC505 9660 bytes
SHA-256: b48728cc25eaaa4a3f1fe5aee8238705bec632ddf4877e53ddc72e9e0363ea67