Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf516c69f760bbb…

MALICIOUS

PDF

35.7 KB Created: 2020-10-03 00:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 21dbefd813221d3021c26f56a6aa82d2 SHA-1: c796379ef6b703e13d02a6fd0d100b935e606f64 SHA-256: bcf516c69f760bbb7800e678e0402df6627099ec1b5a955870e7ac88a512476e
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://ggtraff.ru/strik?keyword=douchebag+life+beach+club+hacked In PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/suxenatajakedowewefazeme.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/famikulurezesilakal.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/84623155391.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/98528027567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1288/0541/files/state_of_decay_xbox_one_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/dogibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/sirabezuzibuxopobaruxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dacf781-9618-44b9-a127-28f982b44cc5/fegususemene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10b0cbe-fdcc-4ab2-8cf7-26f8c1c6bf98/bapuwajixarerutop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae82a44-e1ea-4f0c-b961-6b299df4f1b9/59292384166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f73cff-d701-4463-9856-ec56bd9e7099/40804355039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbbb712-1790-48ef-ae10-6bd032dee747/kivagopaxulozudawotebogaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96aed50-d454-4060-a367-1d83a702d3d3/zebefujuxosazakupekilexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c51262-ab26-41f1-a3e9-b3776c7588e0/85051092227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86784ce4-27a1-421d-884e-0ee2ab2fd2a4/84029808796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8567c539-c687-4d6c-bb23-2b581bd31a4b/bopixupupiduma.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_off00004d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D57 5212 bytes
SHA-256: fcbd42e743d1bad8ad6f89a557f4ae481c4595f5cfe6561c0f2eaaa42e5e9b6c
font_01_sfnt_off00005f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1D 10148 bytes
SHA-256: 41556cef8c3a2051ae780a6cd213f39c1feced6416795b4b2800f20003b6a4b4

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