Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c946f8197403cb8…

MALICIOUS

PDF

46.1 KB Created: 2020-11-08 14:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: fae95c2624b7f607877d498d874369dd SHA-1: a886b3dc4ec88a9e2440c2a36332f8ca2bcd308b SHA-256: 6c946f8197403cb8a06114124ba5d2fa06e72f52bff3ac6f6ee60b85afdc0be1
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/aws?keyword=dota+2+auto+chess+beginner+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f8a45e5f0452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f96ff1372a12.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/nifit.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/868de9ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f8b8243cffe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f9557c7da9a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_5f9608141b504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5f8b757a7d5f7.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/paxivogedewilu/riesgo_biologico_laboral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a352d1-9c89-44af-97d2-0c7d785bb653/reviews_on_testmax.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 5440 bytes
SHA-256: 608b3bfd3481ad7fd4c564d0ea1e70a6f08fb3358ac29193d164e4c4523354dc
font_01_sfnt_off0000727e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727E 10164 bytes
SHA-256: c0140be97e20532a68009395765c5cf4af3909a56527ea71d681793de4d6c408
font_02_sfnt_off00009592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9592 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0