Malicious PDF — malware analysis report

Static analysis result for SHA-256 74950436e9bcda9b…

MALICIOUS

PDF

39.7 KB Created: 2020-11-05 18:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 6e67d937d740fb0dfdbc569a055a18e8 SHA-1: 40322feb318228e161011e67664879ad5180422b SHA-256: 74950436e9bcda9b8123e824c64ce72f315691081d8d178b920fa5f59a000a3e
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://trafficel.ru/123?keyword=piano+roblox+sheets+demons PDF link annotation
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5f9874cd2577e.pdfIn PDF document text
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/6c8a4809b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5f8ea6658cf46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5f91c4766cd2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5f8e1be089b98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f9153ec77070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_5f8d5ee934304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_5f96e723cba6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_5f9d5c26a3126.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/laradusa/powerdirector_pro_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/32974635394.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/2125884819.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/rig_veda_in_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/1993_aashto_pavement_design_guide.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_off00005ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD9 5272 bytes
SHA-256: 1aa788cab33471b9021204bb7bf9123a3ac4a5a16598aa390ed681b078322c1d
font_01_sfnt_off00006c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C99 11584 bytes
SHA-256: 3e47d78459bb77f72e666b0034ea59f95b3a8eccff5da4201dc4783ec712b0bd