Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68097502050bb77…

MALICIOUS

PDF

43.0 KB Created: 2020-11-03 15:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8fcefd2b83022126241c07ebcd3da0db SHA-1: dfb43835b6ca107c2c559ea2e6971edba87d1997 SHA-256: e68097502050bb7728795d95172bc94f880de4996ef38562afe7d6a77e92a6dd
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://cctraff.ru/aws?keyword=movie+hd+apk+file In PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/1430070.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/padet.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/3125712.pdfIn PDF document text
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/6722092.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/78259c9fc3.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/niwinobiga_febofumuvos.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000068b0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000068b0.bin)
    • https://cdn.shopify.com/s/files/1/0502/1066/8724/files/strength_and_conditioning_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/accounting_101_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/soundasleep_dream_series_air_mattress_vs_king_koil.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/55029605154.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/pizutelot.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_off000068b0.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B0 4984 bytes
SHA-256: 0549b2443a0db10038443a5fdb55c0719c8eea3f62f1a8254ee01014703bbd52
font_01_sfnt_off000079bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 11180 bytes
SHA-256: e3bed0849a53f671f5cf23e2d40881211b1805de92194120379f978cfefbb7bc