Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bc2a30a2f5e52c…

MALICIOUS

PDF

41.3 KB Created: 2020-10-01 06:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2fc73a06271f789f74c2d515b0b1a457 SHA-1: e9ff6fc07800bc7df75b8af8224ee7947795cb8b SHA-256: e1bc2a30a2f5e52cec682e5711b6d102a0a3ed58c0b65a09fade453751c769a3
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=groth+marnat+handbook+of+psychological+assessment+pdf In PDF document text
    • http://files.mankinstudios.com/uploads/1/3/2/6/132696145/memivarewud.pdfIn PDF document text
    • http://delaf.forestcityfarms.com/uploads/1/3/1/3/131397971/1f571f0.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/df583c58-c6a7-4d1c-8ca1-579ed52cd5af/jinumikozolugosewinagudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440a9e8a-422f-491a-920a-6917bc44bcde/bozumovavutofetuzodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e919421-8bda-46ac-816d-4034653b52a3/13337453728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1d0bdf-5653-4a5d-a23c-99da4606a03f/82407433972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ac8017-b400-4753-bf01-f4939c378c89/wutubamedetesolid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734856e2-ae01-4f47-851d-95bbcc55c033/77602795430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6d19d5-18aa-4662-865a-8645b2dc5644/58657861929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035b3ec3-1a3e-4365-badd-8e13e46166b3/62583963463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27cd8ef0-f98c-4551-9697-09555a6a2706/fejorefasazepoxenonolavog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3005cd2d-9db1-4a24-877c-72235bf43cec/pofoxekezofagaxilugapusop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c1f3f2-bc56-40d6-8eea-05e277d7d2bc/70513909160.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_off00006303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 5908 bytes
SHA-256: a54e6bfc19c16526d4fd0854b74187c3f26211cdd35ee07e7d79b74090bf20e5
font_01_sfnt_off000076fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 9820 bytes
SHA-256: 7a3011ccca3c1033ba2ea62396d998a911cd92dd315d8bdffac2fd8bf571d21c

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