Malicious PDF — malware analysis report

Static analysis result for SHA-256 036f74ec95f1bee3…

MALICIOUS

PDF

78.8 KB Created: 2021-04-17 16:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d78eacc4dabbdec15767aaa924d5d1c1 SHA-1: 08dbff27a2ef1d212575e725d563faadd1f3f5b7 SHA-256: 036f74ec95f1bee3d99e575517f13a6dfcdc2e5af230d24fedb93f9997987bf4
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a high concentration on disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://vilenefex.ru/strik?utm_term=foucault+biopolitics+quotes
    • https://static.s123-cdn-static.com/uploads/4408346/normal_5fcca72b06ce8.pdf
    • http://znakomstva69.space/59267295252jgk6u.pdf
    • http://gukivuzijisuva.getenjoyment.net/9427081490.pdf
    • http://firstflirts.site/8364222935870nvw.pdf
    • http://risonubokedoxav.scienceontheweb.net/jason_and_the_argonauts_book.pdf
    • https://static.s123-cdn-static.com/uploads/4378856/normal_60027c69ed784.pdf
    • https://cdn-cms.f-static.net/uploads/4382961/normal_60589c6417f3b.pdf
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5fd73d843a325.pdf
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5fc8e92324c69.pdf
    • http://ronifibofizet.medianewsonline.com/6817035108.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_ad61d85cdedf4bef9a5d8ec0062c4efc.pdf?index=true
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_2ff8e981f74d42fd820896e6a3ca7c91.pdf?index=true
    • https://s3.amazonaws.com/zazelujeju/coefficient_of_determination.pdf
    • https://uploads.strikinglycdn.com/files/b87f9f44-6f49-4b7e-a4d0-2311b6c512a6/ledowafesasumotabesul.pdf
    • https://s3.amazonaws.com/buwosevax/40128468117.pdf
    • https://s3.amazonaws.com/xulikamul/36263957319.pdf
    • https://uploads.strikinglycdn.com/files/cb7b6518-64e6-4310-9882-774dade5ddd4/80033142242.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/witcher_2_release_date_netflix.pdf
    • https://s3.amazonaws.com/dubiditiginowo/89898810275.pdf
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_c3fb5e8a830542d797b15ab084b3ff2a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/619f31bc-5f7d-479d-a198-82e54bff6b7f/47898158981.pdf
    • https://uploads.strikinglycdn.com/files/785cfa6b-9927-44bc-a177-8977ca7e83d3/how_to_know_when_baby_is_full_of_breastfeeding.pdf
    • https://uploads.strikinglycdn.com/files/5abcf5e5-5ce9-4ab8-9cd8-f276344e3f9f/what_is_the_shear_stress_rate.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b8.bin
42fb4d20b399d8ad6313d4ba4475bc2b5d6b721835f318fc1c458967c682e93b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B8 5052 bytes
font_01_sfnt_off000107fe.bin
0d887f6684e60ce9a3592ab99a2a88b426c305bee43c157c660c61fd454054d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 10632 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.