Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31cc229bec3e38d…

MALICIOUS

PDF

71.6 KB Created: 2021-03-28 18:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0f856dd40b9187792178682c4045564 SHA-1: 508e5d013722873a0f5f519d8dfc797256d29895 SHA-256: d31cc229bec3e38db4f99ab76286f15b3bf023cc6a3adfb9831f4add74b9eb27
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-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://soxebez.ru/award?keyword=paf+college+sargodha+past+papers+pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_600c4165859f6.pdf
    • http://barajofa.mywebcommunity.org/95000833747.pdf
    • https://cdn-cms.f-static.net/uploads/4450003/normal_603fb598a2d9d.pdf
    • https://foxuginatumusex.weebly.com/uploads/1/3/0/7/130775376/tawiwaxumozenow.pdf
    • http://nibewubixela.getenjoyment.net/sejarah_abbasiyah.pdf
    • https://duvutonog.weebly.com/uploads/1/3/6/0/136020002/9a1d6366a1cd5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_ca999c148dff4a6ea8aec91fc864dc34.pdf?index=true
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_6ee24980a750428482971827b817a938.pdf?index=true
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_6a4eb3d1310b487bb236df6561db62cd.pdf?index=true
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_c125924c02a143ad8df740830468feaa.pdf?index=true
    • http://zujisofivo.onlinewebshop.net/xusas.pdf
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_e474c25793bc4952a3639c64003c3095.pdf?index=true
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_e584428986f04268ba24969589e0a505.pdf?index=true
    • https://5de6e22f-064f-4859-b003-4eaa502c5056.filesusr.com/ugd/2609e6_fa4bea51a1324e0fb30228c75b09dfd0.pdf?index=true
    • http://satovimowenijor.myartsonline.com/sbi_bank_clerk_exam_syllabus.pdf
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_7bf0cb673bed4140b9ef064d2d3177fb.pdf?index=true
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_d2f547b46b3041da8c73dfbc089fbb9c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/40aba7da-c2c7-4fb6-bdf4-9ca1fd2e6e88/13758665403.pdf
    • http://roxujewov.myartsonline.com/6584132397.pdf
    • https://uploads.strikinglycdn.com/files/8897c4a1-952a-461d-bb7c-14f688585028/23342828800.pdf
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_dd3ebfe2340f4ab6b5ef9c92c80d5980.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_off0000db90.bin
5e2f21c2abf6d5a3326b86e0c927b4f9c84e4a39282e206bbe7941a575f92bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 5420 bytes
font_01_sfnt_off0000edf8.bin
8961f74eb327d7293fad2fd3107d4418f7abccf82f5951a8cfe71f000d060978		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF8 10328 bytes

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