Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddf29e987267054…

MALICIOUS

PDF

76.9 KB Created: 2021-04-05 15:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f696704f2c06764a7034522ac8085729 SHA-1: 69b2245abc2d974659403fc30f1a54c0f0185f2c SHA-256: 3ddf29e9872670544a9e33d8ab751b540804d0679db472ff5fbabdf348ef2a9d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to drive traffic to potentially compromised or malicious web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=diablo+3+wizard+firebird+build+season+17
    • https://xuzonikafu.weebly.com/uploads/1/3/5/3/135351414/8c445d05.pdf
    • https://cdn.sqhk.co/vuxesojogugu/W0iihcO/joxusowutolovegozevipu.pdf
    • https://cdn.sqhk.co/razupojoja/jfn7Tij/stick_of_titan_2.pdf
    • https://cdn.sqhk.co/wakewafo/ehiEkQs/disorderly_conduct_wisconsin.pdf
    • https://cdn.sqhk.co/suwajipufo/AXygdia/the_burger_shop_souderton_reviews.pdf
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/3db8b7.pdf
    • https://bujovuve.weebly.com/uploads/1/3/0/7/130738596/61e744153f3665.pdf
    • http://wotimose.getenjoyment.net/antibiogram_test.pdf
    • https://xumejiti.weebly.com/uploads/1/3/4/5/134529375/3722091.pdf
    • http://nakekizedexu.getenjoyment.net/88948878799.pdf
    • https://nazafusi.weebly.com/uploads/1/3/5/2/135297870/biwubikoga_nofiwavirozug.pdf
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/wizifadigijenar-sisedivovipibo-magamipol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_0c20de341e9c4700b2f8db0a6fee2e9d.pdf?index=true
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_27604ff43d1b450f953a8e74823c2fa3.pdf?index=true
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_0ac98b5f215b4633b05ec81602973084.pdf?index=true
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_8a613bc1923e484a98533f04efb99203.pdf?index=true
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_2eff63a988be433ab5ccc7b8f40d6428.pdf?index=true
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_5d795e63b0e74faaac7d66ca44ecb807.pdf?index=true
    • 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_off0000ee38.bin
5d86e8576fbaba013b11f7bf48d1f0a11f8d2f95ac46c9c9c0ca292843e3ac7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 5480 bytes
font_01_sfnt_off00010113.bin
4f547093f42c86d671fc0dff89dd8654b3febf836d06e8f7b194a48607a8621f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10113 10952 bytes

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