Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5ddf956bf459ac…

MALICIOUS

PDF

74.8 KB Created: 2020-12-30 14:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 7a005e581d471bd1d652c34391195b7e SHA-1: 8c01e974ee765f498078e336bd371d1131a65e98 SHA-256: 4c5ddf956bf459acd3a34298150dc9eddeb0c59bf289f40c6b521aa403af625a
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/shook?utm_term=ouroboros+symbol+meaning In PDF document text
    • https://bobenetawif.weebly.com/uploads/1/3/4/6/134666578/noxenowaxan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f9ec5a95ffbd.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/Cajahbh/32813784418.pdfIn PDF document text
    • https://cdn.sqhk.co/fokolamezo/jdughUA/live_price_of_oil_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_5fd3cd075e197.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/Ymzgiic/zewetedodolebokogilufiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/dhiUAgh/steampunk_go_launcher_themes_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f905206cf3a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_5fe98060826a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/270ae11b-1fbf-4412-b3ee-f0d1c50a4235/the_knowledge_of_the_holy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d0ef0f-9969-45cb-9b61-df41335f94b5/cara_top_up_diamond_hago_murah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93bc95d9-6181-41da-982b-eeed36bc79c0/jazise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cb2600-178b-48bc-9210-b10fb5fa2681/nisaruwikinomasirijop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3f8cca-3343-4b94-9350-4641fa70878f/fly_girls_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d1fcfb-06c6-47e4-b931-386a10bcd9af/free_robux_codes_2020_september.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_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 5276 bytes
SHA-256: 643378014411c1365d439b79297e5aed9189c5445b1bd256c47807cfd39c61ab
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 10796 bytes
SHA-256: 34a9e3b8b46d31ef4c4bb73f280d29d814c618952dbe971014ba6202a8be322a

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