Malicious PDF — malware analysis report

Static analysis result for SHA-256 723e69dd41cede73…

MALICIOUS

PDF

71.4 KB Created: 2020-11-14 11:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 222a4327691c659e8963c6d111019eff SHA-1: d0682b972870a23aaeacb46fa2b4fa4f7a4c6d30 SHA-256: 723e69dd41cede73b748b6e33f96d9cf2292a26aca0c7b7227852208d0caf992
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=anglican+high+school+uniform PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445888/normal_5f9d2136cec54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86fea03154f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5fa8db652e45e.pdfIn PDF document text
    • https://nufivinob.weebly.com/uploads/1/3/4/6/134682897/vesaweligulel-pawinovatiru.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/435062.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://uploads.strikinglycdn.com/files/300c3831-f6b2-496c-bcfb-43c2411d32e0/luganugosegedokudas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1046b7-1889-4d32-b42d-0021b8e89352/79087567568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec8a241-58e2-45a3-980a-17f22e47e13b/abomination_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ea2c25-133c-4562-8b40-932d7f8954ce/15828556931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d14044b-b5c3-433d-9818-7d19cb1bf228/gutizuwuwagetodobibonep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab97409-41ff-4a60-a6a6-5a384baae38b/free_sozo_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6471986-640e-4ac5-8dc8-d56cd051ffff/behringer_ultracurve_pro_deq2496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62278455-f715-44cd-b4c2-4d2a06f3a04c/dugilumiperavobukevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356f5e1f-91f6-47f6-a987-7a3a0a389214/40747841426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84f00e4-6700-4d52-b30b-486a37247cc2/51101259545.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_off0000ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 4968 bytes
SHA-256: 15d789ae6f87f7fbf4d769027d852872350665c9e80975c241079a05913369f3
font_01_sfnt_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 10412 bytes
SHA-256: 1c168dbcb11c76403d9628855b47d7408cc548db3fdcc8eabb7d4a66ee0bf195
font_02_sfnt_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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