Malicious PDF — malware analysis report

Static analysis result for SHA-256 96531798d63060f5…

MALICIOUS

PDF

75.2 KB Created: 2021-02-21 04:57:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 78cf25877453c5c72dacfc3979a2c643 SHA-1: 0450076c64f5ee3d54ddea45b226302b8a7adb80 SHA-256: 96531798d63060f5861249adbfd6dd4930292e1ba1eeabd470742ec0152f0456
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • PHP webshell / backdoor source high WEBSHELL_PHP
    The file contains PHP server-side code with the signature of a webshell/backdoor (request input fed to a command/code-exec sink). A webshell takes attacker input from an HTTP request and runs commands/code on the server. Flagged as a malicious hacktool artifact even when carried inside a document or archive — the code does not execute from the carrier, but the file is a webshell.
  • 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://leonvi.ru/aws?utm_term=how+many+shows+can+directv+record+at+once PDF link annotation
    • https://cdn.sqhk.co/talurelope/iegd6hh/rock_music_party_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/guzikiku/hheWChb/nigunos.pdfIn PDF document text
    • http://hydra.moscow/jetiverumabakobubedlvtx.pdfIn PDF document text
    • http://winoraama.space/ninja_jump_deluxe_mod_apkd0ej6.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/449497d.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/vqgdjdO/metro_name_id_apk_cracked.pdfIn PDF document text
    • http://ergors.space/gastroscopy_report_samplezz9w2.pdfIn PDF document text
    • http://afracheat7.xyz/french_verb_conjugation_table_prendres966t.pdfIn PDF document text
    • http://noksipals.online/how_to_respond_to_form_interrogatoriesvb4wj.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/3942000.pdfIn PDF document text
    • https://xotufidew.weebly.com/uploads/1/3/1/8/131856134/6c469b5a1edf0f7.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/napisakaluja/forofi.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/http_my._norton._com_account_billing_information.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/47115009972.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/nigekabasegutelidujure.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_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 5364 bytes
SHA-256: 5d3266d96e9576b7ab5ee9c9320ea41e700d03aeb35ccc3593e6e173ce33bdb6
font_01_sfnt_off0000f98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 11264 bytes
SHA-256: ce5a93672c53e59156e58512214390edf7e8477e7ba79acfafaed819d13fb08d

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