Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f9cc7a3283681c…

MALICIOUS

PDF

79.1 KB Created: 2021-03-30 07:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7868528a69709acd0facd9f48f517e1 SHA-1: acde35d1f14a8b62b5ff92674ba6e4dcfa51d72a SHA-256: d3f9cc7a3283681c385f7b67a6a985a26aac5804795f2254fff5671987762da9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'jumiwimov.ru', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it's designed to trick users into visiting this malicious URL.

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 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://jumiwimov.ru/award?keyword=colloquial+arabic+gulf+pdf
    • https://cdn.sqhk.co/xufojidaju/pWijijn/lowonovavozirirodasi.pdf
    • http://axecheat9.xyz/xukonebemeqam76.pdf
    • https://cdn.sqhk.co/biluvetizom/tT8hbja/tinojubuzoraroxere.pdf
    • https://cdn.sqhk.co/bilexodofose/0cNVFja/kadepagejagudesaju.pdf
    • https://cdn.sqhk.co/lifudidu/gcKLt7U/mcintosh_county_academy.pdf
    • http://zikewexer.scienceontheweb.net/bedemexekamatesuvaguga.pdf
    • http://opsnatur.fun/edinburgh_airport_mapifu4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_887fa9be930c4c2cb844f71f8687a1a7.pdf?index=true
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_0669164f418046fe833fca969a817321.pdf?index=true
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_c2572c74abd549c598f162cf04cfb1ea.pdf?index=true
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_5da4d39df59546dc8f5ae8a76d28905a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3fd1f847-2922-4df5-9738-8b82c1c03f1a/how_do_you_make_someone_love_you_in_wazifa.pdf
    • https://uploads.strikinglycdn.com/files/547605d6-9c05-49aa-a353-d5f3dbcdbac7/49245585858.pdf
    • http://disoluje.myartsonline.com/egg_pasteurization.pdf
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_adb1b0014167447bb7f9e302641d41a9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1f9a0846-678a-4974-8b8b-7307f048fcfe/zetepagiganojus.pdf
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_39ef338d34f642bfa5c85fcf48e5a950.pdf?index=true
    • http://pizenusogusu.atwebpages.com/biodata_format_for_marriage_purpose.pdf
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_05d00317abda44e88ded95c7e85aca5e.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_off0000f83b.bin
e800b4c3b4d53fb206e0454cec798f4ffd6b8d7b7ca5f3c5f1944e3d3aafa54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF83B 5316 bytes
font_01_sfnt_off00010a4e.bin
7705fb41cccf21564f1604623b28ed170a9689bbd4c34307dbff32f724dff163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 10784 bytes

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