Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbeef555e872f908…

MALICIOUS

PDF

66.6 KB Created: 2021-02-23 13:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3bf26804288db466c455ba9406a78e77 SHA-1: 7bb433c618d0bf966a398013d6250160b7819a28 SHA-256: fbeef555e872f9089247d646d33b62badf03ccee5a04e7ebd90c43350289a1de
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://yafferge.ru/wix?keyword=a2+cosplay+tutorial In PDF document text
    • https://cdn.sqhk.co/rujuwawuju/JQidjew/15236350956.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/vuxorasusotu-momanudu-dazepuwupa-zisagujox.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/aYRnghF/32272650316.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/1571658.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/gh7svH6/bugsy_siegel_death_cause.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/ejgKwxX/beat_cop_apk_full_version.pdfIn PDF document text
    • https://pijetupuz.weebly.com/uploads/1/3/4/3/134351396/66c4cf296f836d.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/Bjepjdg/raider_origin_warrior_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/j6B4DeR/irctc_rail_connect_login_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/Diechdn/48548157426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474457/normal_601fcf9cb3e18.pdfIn PDF document text
    • https://zofoneparadi.weebly.com/uploads/1/3/5/3/135341866/3032876.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/6ggihig/collage_maker_online_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xusozapovu/jdIjfOJ/super_mario_world_2_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/GbrjggU/5212041486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC993 5152 bytes
SHA-256: 718540b5e8160c1be86012f255f88d415ba25a37431d0e6084b6e59ab8a5ebb1
font_01_sfnt_off0000db36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB36 10164 bytes
SHA-256: e549a5d02fbf0187c6c03a9b36d59b046dd4d59d6c5632f447ee8e320cffdbf5

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