Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95e3cb78f52ad6e…

MALICIOUS

PDF

43.6 KB Created: 2020-11-06 21:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: aac9bd5e4d85f198cca8282647f10eb6 SHA-1: 808302aeab1f4fddd8d37afa3045824bb6f054f1 SHA-256: e95e3cb78f52ad6ea73175d3cb0f924738afdd12ee25fc55bb060a2d47e712d2
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://traffset.ru/aws?keyword=examples+of+alcohol+misuse PDF link annotation
    • https://zuzilenew.weebly.com/uploads/1/3/4/5/134527977/fokozaguzum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f914e4683f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8718dbbf538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5f9c3f871abc5.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/15e006e8c48f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_5fa077f868203.pdfIn PDF document text
    • https://somisesi.weebly.com/uploads/1/3/4/5/134523690/tavululile.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b8b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b8b.bin)
    • https://s3.amazonaws.com/tixedujegibex/commercial_super_automatic_espresso_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/mii_maker_rom_3ds_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/jezus_elete_magyarul.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/2557837984.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/museum_of_natural_history_scavenger_hunt.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 extracted file (font_00_sfnt_off00006b8b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 5184 bytes
SHA-256: df7ba5905173ebb5507a84b787b4a7950b2995c3b43d5b550ad595d1132d8001
font_01_sfnt_off00007d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D15 10808 bytes
SHA-256: 741f7728cde6dddc44ddf1ffd052444b6b78948ed2f5c5f96b2d46b0fc08932b