Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5600a0071897049…

MALICIOUS

PDF

41.9 KB Created: 2020-10-30 00:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 88da1cb3cb8d42b3163c335c296ba24a SHA-1: 5c10075699f18d7fb10c3180efc1ffe40c5fb7e1 SHA-256: c5600a0071897049f874033f0e1ace2cc9f504e9c8e49548fd25e72b19881721
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=the+world%2527s+hardest+quiz+crazy+games In PDF document text
    • https://nazivuwe.weebly.com/uploads/1/3/4/4/134452961/f05ee203ea34.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/wizovaderu.pdfIn PDF document text
    • https://favurujovonelod.weebly.com/uploads/1/3/4/4/134435517/tanejarejibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_5f9a12817d40a.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006286.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006286.bin)
    • https://cdn.shopify.com/s/files/1/0497/4300/3807/files/37800862402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/interstate_battery_warranty_firestone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/prove_it_all_night_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5584/7842/files/26917315237.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/1896196276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7804/4833/files/rixufugamuxokexiwiza.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/error_implicit_declaration_of_function.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_off00006286.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5708 bytes
SHA-256: 2ae44c16706e46ecaa27a773e2340e62bbe4deead0a06c893266634ba286fbe0
font_01_sfnt_off000075de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DE 11004 bytes
SHA-256: 697cc932a45e235f9e667909d0c6addcbb5b76701500305269fc0da360a662e0