Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ac9acd4be20ed3…

MALICIOUS

PDF

63.8 KB Created: 2020-10-01 03:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 88b1cd8ccc9383d5bb4874ff77adb436 SHA-1: f33da4f649e664976285aa7bcd031c9b11d58792 SHA-256: d5ac9acd4be20ed34c35dd043a2b8c2eb0bfd46937c3998618f81829592c6412
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://gettraff.ru/strik?keyword=antecedentes+historicos+y+filosofia+de+la+fisica+pdf In PDF document text
    • http://fevidom.universityplacewallc.com/uploads/1/3/0/9/130969110/sinesi.pdfIn PDF document text
    • http://wuxinoje.blackandright.net/uploads/1/3/0/8/130874413/8719967.pdfIn PDF document text
    • http://guxoda.javasisters.com/uploads/1/3/0/7/130775288/bovinoduke.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/12503ff8-1db2-4a47-b057-389cca266fb1/sarezewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3278acc-b42b-49dc-91c2-8d21e22dc7a1/6785837651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98040a53-0af8-4c4c-91ff-cce92e8a3d8c/gezerevozidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31eaccf4-3d31-4b1a-ae2a-facca014972c/79478146813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442bd1d7-247e-4bfb-b354-2296537cce09/maxexokalijijozog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbb42ce-4891-4cfb-992c-8569e7721ea4/35380662715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1d4258-9238-4682-9132-b498aaac349a/21529743839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8518a7f-a13a-439f-a62b-571dbd621184/tutideninuzonodiwek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5207d8-2e01-4309-9af8-4ed366718f6b/tademeto.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB999 5336 bytes
SHA-256: cdedf37cbcbb3f00f82539300ca967387cf0271a1b56a418e42c0e85749d3835
font_01_sfnt_off0000cbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC5 11192 bytes
SHA-256: b7818bd529c989232fe2ba7ebc2bad3bf01c923b4b06607a21e989ae7ee3f4b3

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