Malicious PDF — malware analysis report

Static analysis result for SHA-256 0343db31fa399256…

MALICIOUS

PDF

39.8 KB Created: 2020-11-09 01:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f2f52622da93ef8b692f6c5f36df7661 SHA-1: d7640dc39bc90b3811b55a86767b257b09ed564e SHA-256: 0343db31fa399256cd0137de53b62672136f7e00c1b5aaa5dd0084b4807ac73b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=sly+cooper+3+imdb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f8d69fc6d05f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f874c9992302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8700402f334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f9fc60bdf921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5f91537aa8616.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_5f9bfec3cc8d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fa0cb0fd3222.pdfIn PDF document text
    • https://nonuvatemex.weebly.com/uploads/1/3/4/4/134443968/rogewuminar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://napawun.files.wordpress.com/2020/11/multivariable_calculus_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b5e1db-e58d-4393-ad07-2f44ffda3ca2/74188837612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973eaa8b-4ffb-416c-9588-b04e860cfca4/fuzomezumufoxojavijoj.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_off00005bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 5340 bytes
SHA-256: 52d44f442dca7f730e1377d2bbe27a6422e04abd235b018264602d6f3d071d7b
font_01_sfnt_off00006dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 10452 bytes
SHA-256: 64945015148b6c373a2589ca8d65a948b0aba826bde5173cb76dbc26bace1d31