Malicious PDF — malware analysis report

Static analysis result for SHA-256 e918d0fd8393d07d…

MALICIOUS

PDF

157.1 KB Created: 2021-03-15 21:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ae0719cd06d2b722877af4156e51525 SHA-1: 72e9e3eb226f96ef26467daa3f23a7a86fb3e4b1 SHA-256: e918d0fd8393d07d9712e953fe5818ef38d3e7e5bea5012b9505e1fdc57ef766
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, 'dafemum.ru', which is likely used to host phishing content or distribute further malware. The document body, though partially corrupted, contains text that appears to be a lure related to a TV show, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 4

  • 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://dafemum.ru/strik?utm_term=does+blood+c+have+a+season+2
    • https://cdn.sqhk.co/tifatuju/1jdjhjj/latenemagopasexigukam.pdf
    • https://topazezinin.weebly.com/uploads/1/3/0/9/130969714/kofepadapom.pdf
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/10eaf13c4d3.pdf
    • https://cdn.sqhk.co/ragojagef/cb4ghye/f1_tv_coverage_belgium.pdf
    • http://retamos.mygamesonline.org/84616498881.pdf
    • https://cdn.sqhk.co/wogirujut/wohegjO/tabletopia_easy_games.pdf
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/991079.pdf
    • https://wifojulov.weebly.com/uploads/1/3/1/4/131438113/dca91ad63f11.pdf
    • http://kemedejovon.getenjoyment.net/basic_english_grammar_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/veledabejufi/computer_hardware_and_networking_in_hindi.pdf
    • https://b5bf9d6c-20c1-49b5-85fe-623de7fa9aef.filesusr.com/ugd/e745be_b151df068ffb48f4bf437f217475986b.pdf?index=true
    • https://s3.amazonaws.com/fapaga/cam_exam_full_form.pdf
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_e66e02708e314f43a8f8e6a4b0f39f7c.pdf?index=true
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_457a6950c2154be18076329a647bb9ac.pdf?index=true
    • http://todifisafi.atwebpages.com/fapebejalogopozut.pdf
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_078d2eff84314bde8f6b3a2bd0c85380.pdf?index=true
    • https://s3.amazonaws.com/jejulurowev/jisafufoxedapuzik.pdf
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_1499ce6a4b514152ad6df19dc98fb617.pdf?index=true
    • https://s3.amazonaws.com/jesidofefe/beluvosovusikufodadokulo.pdf
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_42ff58728d7a4983b6fc2d3b00e4c703.pdf?index=true
    • https://s3.amazonaws.com/bulikowexunepov/27531842647.pdf
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_e81ff1be78534898b9093426a60676e6.pdf?index=true
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_f93328c0cd1d4131881a9f6b8919938b.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016b42.bin
47a5fc6e4981d0dc8ed391689d4431c8d98e740621cd2fc92d1199a15fcc228a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B42 52120 bytes
font_01_sfnt_off00020b88.bin
198529426d6333e0b8a9958a34c3d9ff1b2ab9a2d4f654ec3dfbdf7d9030d1da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20B88 4920 bytes
font_02_sfnt_off00021c36.bin
58ced9289fec021e2a3854f6b435ac9191cb1cca24ebbb7c2618d42168e0bc18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21C36 11320 bytes
font_03_sfnt_off00024289.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24289 16060 bytes
font_04_sfnt_off00025723.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25723 4324 bytes

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