Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ad34075f2f62c6…

MALICIOUS

PDF

81.1 KB Created: 2020-11-23 05:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 89e60f43f16c3ed0910ce6edb56143f8 SHA-1: c96182d9d624442e2494fa5fec61c4e327b56a14 SHA-256: 58ad34075f2f62c69769e59e147a4aa63f0c664cea24f488620fa0562a7c2637
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, with numerous external URLs pointing to disposable hosting. The presence of a 'utm_term' parameter in one of the URLs suggests an attempt to track user engagement or direct traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/aws?utm_term=ayaka+hirahara+discography PDF link annotation
    • https://temoxemotedi.weebly.com/uploads/1/3/4/5/134599163/377687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458839/normal_5fa2f24230424.pdfIn PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/tolenilafafen.pdfIn PDF document text
    • https://mefevujeloz.weebly.com/uploads/1/3/4/3/134317202/1523202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f87820fac8c5.pdfIn PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/d20bc416d3c07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5faf15aab8bbc.pdfIn PDF document text
    • https://nukewixe.weebly.com/uploads/1/3/4/3/134385223/4387150.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/8901043.pdfIn PDF document text
    • https://xosotujusosevo.weebly.com/uploads/1/3/4/3/134377620/607e8a8.pdfIn PDF document text
    • https://nudonadutosaj.weebly.com/uploads/1/3/4/5/134595964/zurupusikesoni.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/585f224c-9c27-4700-9b54-f1a05ee8e67e/matusox.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_off0000c33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33C 18892 bytes
SHA-256: 31eda3c95d31b9e60d396f97225288bfadd1a9ce20a88845c2f2d447abb5055c
font_01_sfnt_off00010058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10058 5460 bytes
SHA-256: 268c7c3aa5ec353b9e50e0bd425783cc5421fb5d3e49be97bf78a136b2839b65
font_02_sfnt_off000112f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F0 10964 bytes
SHA-256: 8d2ddea23a985648b6b462cc450ef0ff932e9bfd61be72fe3a4cd7bf7ae03e9d

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