Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96bd9989a4ddccc…

MALICIOUS

PDF

88.2 KB Created: 2021-01-26 04:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a9b72b27c6617b6aa4e8f386fe5c578b SHA-1: 5cfbed91cfdb1ce1ed4e65901299071963a59b6e SHA-256: f96bd9989a4ddccca94f7889bf058ac3c71f46b871c6977ceaaa196e4437e7b4
254 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.
  • 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.
  • 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://cctraff.ru/wb?keyword=gba%20emulator%20android%20cheats%20pokemon%20ruby In PDF document text
    • http://gatorama.site/viwovinet16f9o.pdfIn PDF document text
    • http://tomogorman.com/hack_game_my_talking_angela_ios1gtwk.pdfIn PDF document text
    • http://filanion.online/kebugonatekudimuboxejomof7oes.pdfIn PDF document text
    • http://samo-katim.ru/generic_adderall_20_mg_imagesz3kd6.pdfIn PDF document text
    • http://com-copyrighit.com/litawizuxp1k5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475580/normal_5fc98afbca5b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_5fdc870e4a46b.pdfIn PDF document text
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/lebola.pdfIn PDF document text
    • http://furniture21.online/94903712837v1lqt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392861/normal_5ff611f156f7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fdae8e5848b0.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/laradusa/anesthesia_for_arnold_chiari_malformation.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/toraruvoko.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/autocad_commands_list_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/shunt_resistor_datasheet.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_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 5652 bytes
SHA-256: 3d83230a3be3b26306fa20375691ed0aba19ea8178c7c02c4854bb4b98407946
font_01_sfnt_off00012a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5F 12348 bytes
SHA-256: c3aab282a5add6ffad2aaa6225a2f1af5a7dc25b32d5b4330ffc13c104502f60