Malicious PDF — malware analysis report

Static analysis result for SHA-256 caba0160fa5c2562…

MALICIOUS

PDF

43.9 KB Created: 2020-10-07 23:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bff77614c80bf130a6df804db559e277 SHA-1: 2fdab686a6b955d2d95b6b457a30c19e6ebbc97d SHA-256: caba0160fa5c25626db969a14b4f1c0e20e38de05b349fb216458e5666eb9e75
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=blender+2d+animation+tutorial+pdf In PDF document text
    • http://teniwa.knobcreekumc.com/uploads/1/3/1/4/131453501/3507442.pdfIn PDF document text
    • http://files.standtallbakeshop.com/uploads/1/3/1/4/131437822/nezix-wuzewen-vonebe.pdfIn PDF document text
    • http://files.thesmithclinic.com/uploads/1/3/1/8/131857626/4457167.pdfIn PDF document text
    • https://site-1038744.mozfiles.com/files/1038744/jobevebagim.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/30932147461.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/6312bcdd-ff7d-451f-be29-d391b38930ed/50845901193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbf5b27-ef05-440b-a95e-537334f8a51d/47316918396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fbc7711-9b7b-4011-a989-271cb025589a/xawewimikotebivuvuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3baf2884-80cd-4e63-8351-70923ac2f286/33206897733.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_off00006da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA2 5192 bytes
SHA-256: a18c71f0edd63bd953eaf77b7260dd9800fe298e059aa7996370c5114ec2b02b
font_01_sfnt_off00007f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 10672 bytes
SHA-256: 0d31fb166076ea9820d6fc31b9f140e946f34d5f3bf69b1188088fc5c4c772e5