Malicious PDF — malware analysis report

Static analysis result for SHA-256 1241d75395ea2ab3…

MALICIOUS

PDF

79.3 KB Created: 2021-03-14 06:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5f9b60c8e7f36b0618b8483c5dc69153 SHA-1: 5928fc0374d69f9411acc69ced1b5894a9b1106c SHA-256: 1241d75395ea2ab33735de92e39ee1d44bd0a8ad447d1204e08f59bbe86046aa
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'new movies sites for mobile', likely a lure to encourage clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=new+movies++sites+for+mobile PDF link annotation
    • https://cdn.sqhk.co/bimepefav/iiIjeAH/pc_games_more_wow_bibel.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/25662906409.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/agency_problem_in_corporate_governance.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/hgfjeYh/biguxoropofevugiwo.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/nisegegatatesut.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/ifjdDid/64006673741.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/ZuGqgdC/lathe_simulator_lite_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/hzid3sx/remote_control_drone_camera_amazon.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/23010318927.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/international_journal_of_research_in_pharmaceutical_sciences_abbreviation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481420/normal_601d3bb84bb77.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/cuantos_pies_cuadrados_tiene_un_metro_lineal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5fdaf5b125d38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/2006_ford_6.0_powerstroke_oil_capacity.pdfIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_f9e15e559b024c36a453bfbfcacdb792.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_733c3984c35a42018a3c3958c6a54db0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/ritosisukodabafubepasiz.pdfIn PDF document text
    • http://bupalim.atwebpages.com/34773850033.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/28527843302.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/vinukuvuxotipuneviva.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_549e2438f2c3423a8fef065c7ae488ce.pdf?index=trueIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_3cb441735b884cb3bfb438b6fd069f6a.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 4964 bytes
SHA-256: 0df026802dd4319f413f4db26762b5d02d6eef184ad2ba193fb82d7ae44e5c22
font_01_sfnt_off000108c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C0 11544 bytes
SHA-256: d3b508b7855ddae010a503f273831161ca166220d1f05e009faa2d8588afdb23

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