Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c89e49a5d9fc0d…

MALICIOUS

PDF

41.7 KB Created: 2020-11-09 16:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5dc7848e506042ad250a906d45fad499 SHA-1: c93d93d5b28d128acbd19f74fee2ced5e569af67 SHA-256: 67c89e49a5d9fc0d9db6d5869d1559c5c0bba9acbd8b468e36460bdf9dd725be
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=anthony+kiedis+books PDF link annotation
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/9092635.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/letenoxaja-rarureb-ruvulube.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/wituf_wexesajekabok_sifakepunudes_nelutuvesotut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_5fa3311de5f3f.pdfIn PDF document text
    • https://jizufozerujit.weebly.com/uploads/1/3/4/3/134343201/mibew-padak-wajujomidero-fibuforod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f333b6b-5a76-414b-8e63-72986c1d194c/21607914305.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/tecumseh_small_engine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/linkshell_vendor_ffxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c23185-ec57-4d45-8be9-0afd1ec1e297/northwood_carnival_glass_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/46029446687.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/hug_high_school_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/jerebivok.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/terapi_neuralgia_trigeminal.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_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 4872 bytes
SHA-256: 047481cf0276288fccaefec45344bad95ff35e862280058b235848cd13677e46
font_01_sfnt_off0000743d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743D 11256 bytes
SHA-256: b6afcc31fccba8c97878f349e114a5a7b19ad49ed46abe915712f30af8736b44