Malicious PDF — malware analysis report

Static analysis result for SHA-256 469dfa0dcac935e9…

MALICIOUS

PDF

82.5 KB Created: 2021-03-15 04:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 102b7f6c5b0cf1f6e9c92e534121dd13 SHA-1: 24d1c0bb209a7f3b102f100737eb4f6e2a00a1fb SHA-256: 469dfa0dcac935e9f78a49ea1618e64737ef48177ac2cbc85ceede36c5635dbb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=worksheet+predicting+products+of+chemical+reactions
    • http://stnold.com/xejopuwxpdqm.pdf
    • http://uscreditreport.info/gifidojefv5dfh.pdf
    • http://konsalting.info/63725416462w52a7.pdf
    • https://cdn-cms.f-static.net/uploads/4499005/normal_602b901c0f71d.pdf
    • https://cdn-cms.f-static.net/uploads/4460042/normal_601e09e90ffcb.pdf
    • https://cdn-cms.f-static.net/uploads/4424692/normal_6015dae9addb5.pdf
    • http://pihodze.com/sivojefagaboxulawubily7a53.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_199c44f7bfb647d59616ca8f4d33f879.pdf?index=true
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_c29affe51e9447cfaced78a6b45a3b27.pdf?index=true
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_6ed230cce6ec4a528dce817945d91be3.pdf?index=true
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_b6314b9e233b4f63909423c4967b5d6a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5cbf37ae-5f4a-4e23-b5c4-6245df669663/kekarul.pdf
    • https://uploads.strikinglycdn.com/files/417746cf-1052-4e3e-bfe9-59a50d8eab28/mastering_vmware_vsphere_6.7_free.pdf
    • https://021f61dd-2d17-4fb4-8966-b8ac8bb26322.filesusr.com/ugd/07e02c_d7743a0347f948199ecaac062a886fb4.pdf?index=true
    • https://s3.amazonaws.com/xoferuzu/lizofefogoluxesibegafexa.pdf
    • https://s3.amazonaws.com/tozaduliwubega/definition_of_national_development.pdf
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_662fc1743b1e43d48a8fb87a13d05e17.pdf?index=true
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_96689004d193481bb8fce00c4cc0f1a9.pdf?index=true
    • https://s3.amazonaws.com/fazujo/vafanuf.pdf
    • https://s3.amazonaws.com/bisazabe/carnival_of_venice_euphonium_solo.pdf
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_dcb10dc196f943adaebc2e50458aaca2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9b5c2f03-0c47-4617-886f-932cdb27fe4b/power_wheels_dune_racer_battery_connector.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_off00010327.bin
683da48159adef2e68ce3e51c475fe87aa1cdbdeb416989d6c54a940c1b179ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 5648 bytes
font_01_sfnt_off00011644.bin
dc5cb99d5e4d8764f712e0cb8d0a4b73aa138e5d669304e81e85d9c784f9090e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11644 11368 bytes

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