Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46cb92597d6152b…

MALICIOUS

PDF

40.5 KB Created: 2020-10-04 23:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e5eaa0239c4fd6dec52356761b132ab7 SHA-1: 74a729961e9e61ae8ddfa5f36e9755ed967c16ca SHA-256: c46cb92597d6152b47d7d2a30b97d89657216fefb4e8d0f698c16ca6e0a4fa42
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/strik?keyword=appcake+no+jailbreak In PDF document text
    • http://jepolajaj.suppjects.com/uploads/1/3/0/7/130775451/6731c8843af61.pdfIn PDF document text
    • http://files.firstandmainre.com/uploads/1/3/0/7/130739081/gidigivene.pdfIn PDF document text
    • http://wesixajol.houseofmonika.com/uploads/1/3/2/7/132740212/lilaz_wadodegilepo_lajegagotef_nikodelaje.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/08619de7-7856-4654-b74b-b53abaeb7e66/vetuvegisofututarive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080b001b-8101-4600-afc4-9c0dae8e2604/jivasafenuredebepatujofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746c97ae-7c2b-40a4-9073-40422cd15177/27953025331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95763c20-99fd-4a80-9b15-c0dadcd7267e/27296337101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215323d8-5ff9-4c6b-94f8-8699793d834d/xitoribejenutabakelavakog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3ad376-624d-46d6-8968-4e2075f7d525/datetipovore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf5cb8d-385c-4027-8094-b5d681cccd86/rugutemilofefixeten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68082a51-4c8d-4b67-86a5-8a311818260b/tilarejidepular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fda629-a153-4e6e-a370-b52b913e97a4/joxutiziretaxutun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7f1af7-1b53-4ffc-99a9-aeae045477d2/joputatufegunarewope.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_off00006164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 5020 bytes
SHA-256: 0fcbf4989b12e13a768675cc141d3eb45f40f886be47744887d207ad7114cb82
font_01_sfnt_off00007289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7289 10340 bytes
SHA-256: 95e3fb09057fdb62687dddc15cc182262680dca702a741a7a5e1887802a4cadd

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