Malicious PDF — malware analysis report

Static analysis result for SHA-256 35840faffb1454a1…

MALICIOUS

PDF

43.5 KB Created: 2020-11-02 06:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 9bc8c4ae2936192b1ab4b4724e67c1ed SHA-1: c2882fc3808ccd07a45e9cab5477ae98b6ad41f7 SHA-256: 35840faffb1454a1cfb6695ab0a40e9148ea4bcfae9a67bf1ecdd70c3778d308
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://ttraff.cc/pify?keyword=seven+deadly+sins+season+2+dubbed+free In PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/kodiridogijero.pdfIn PDF document text
    • https://delimilakemasuj.weebly.com/uploads/1/3/4/4/134400920/1618924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5f8f42216a945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5f9d30cad2635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8a82a3e5bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5f9d3897cf840.pdfIn PDF document text
    • https://wovuxekas.weebly.com/uploads/1/3/4/3/134379471/31d6a9b799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/80506757201.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/64769194030.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/acid_bases_and_salts_class_10_ncert_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/gusaledikugumo/layers_of_skin_labeling_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e815c2d0-ea4c-4f22-b04d-b9c3e54b00ce/lonejakirisemelusukiru.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/pezeveriwulewezodevawoj.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_off00006af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 5440 bytes
SHA-256: 6d45d434a17fa2399aa0102700501528bc611be6c005f921602603b67178e557
font_01_sfnt_off00007d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D85 10580 bytes
SHA-256: d5df5969bd0996da288df1e90b93ba9aabc316da4c0728842b99c169b266067b