Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e0f679d38cd694…

MALICIOUS

PDF

68.3 KB Created: 2021-02-21 13:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5388f522a38641eebe6582d4de4ef986 SHA-1: 6bba3d7cc9e313094ece996f036889d557a419d8 SHA-256: 50e0f679d38cd694b73c4830c88358bbe5032450da35d521e3ce7a9dd2dfbe45
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=john+lennon+vs+bill+o%2527reilly+lyrics PDF link annotation
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/9829553.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/gfLhdip/sezerolunituxifijenujezej.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/iiCijBU/george_strait_troubadour_album_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/kevemelis/ehgjdwC/42871077399.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/jitiiAd/kawiwe.pdfIn PDF document text
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/6092000.pdfIn PDF document text
    • http://prodive.su/pac-_man_world_2_steamvt28b.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/d1jg0bM/fabikumafokuvesuribubugix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zulexesovo.epizy.com/jiliwiporuxewidanelona.pdfIn PDF document text
    • http://xenemusexo.epizy.com/how_to_format_booted_pendrive_in_ubuntu.pdfIn PDF document text
    • http://nimezidudixo.epizy.com/zefubagulakepijufaropib.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_off0000cf91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF91 5000 bytes
SHA-256: d10321ec4ea0d19c9d304851c5340fb3a7942c567c91b46e8c3234ebc93bbb5e
font_01_sfnt_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 10576 bytes
SHA-256: 0a8cacb0f7324ffd181f4defd555ac26e959054d5d3d7959e0fd58a55ceb6b11