Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a62472afb3a582…

MALICIOUS

PDF

64.8 KB Created: 2020-11-05 21:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0dd616b1e67ae3d1a3215cdfee93ea52 SHA-1: 4b327ce8d3b94fa9ca694df23143aa450e379b62 SHA-256: 58a62472afb3a5821aaa278064ceed4992e6321f571217054969708c8a57ec67
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/123?keyword=business+level+strategy+of+ford PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404959/normal_5f93ded8c3e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5f9992a131e5b.pdfIn PDF document text
    • https://konozobit.weebly.com/uploads/1/3/4/4/134456152/movemotuwaj_rupefevagu_jigurorobek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5fa3b6a3dce2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5f99bce613680.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fedojigudaj/ruxojodepesirijo.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/70149640876.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/37350194463.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/asian_garden_menu_bristow.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/85080527824.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/20755809856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0252e71b-d1c5-4339-b3b5-8fcc3294022b/javajulotugewek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD80 5168 bytes
SHA-256: 33bd847600e54ef8cc03ad6c443e233acaee1edbfcac9c460e85c8594c1f8bfe
font_01_sfnt_off0000bf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF25 12052 bytes
SHA-256: 8e41e8ea89149ce0a765f20f1e9d2551114418aa311b490f6bc338179db2c40b
font_02_sfnt_off0000e812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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