Malicious PDF — malware analysis report

Static analysis result for SHA-256 a962ceb5bcb9ebaf…

MALICIOUS

PDF

46.7 KB Created: 2020-10-22 16:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8bc1bd56066b30a6a8f29da169dd4c57 SHA-1: dabb74dd31878a798780760b995e2594bbb58d91 SHA-256: a962ceb5bcb9ebaf760f2e12d0fbefc280fa8ba5d240f3670f90270381602a02
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=muscle+gain+diet+and+workout+plan+pdf In PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/migerolam_zapoxegowokid.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/4172681.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/7061675.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/fivumuva.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fefetimutalojak_zaxanolopafimi_ditikifuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8bccaa1cabd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f90b28299353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f8951166a8e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f90946a7c5d3.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/kavitokolezub/1768528357.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/katapemexerirexefogikulu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/mevexezirufon.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/68878522431.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/venovezanatodogakuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/29763109743.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/leduxadulafasefebat.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/arabic_to_malayalam_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/tuninitulalotin.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_off0000748e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 5484 bytes
SHA-256: 17b6339ba09ee588a07ab203b090ec9b112d61ceb10ac9d21990d38429762c77
font_01_sfnt_off00008764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 10672 bytes
SHA-256: 09ad759ebdaec986fb056e1f61b38b90f680fc3d84c6a183b3b585943bfa4594

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