Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e09dfe62ef5063e…

MALICIOUS

PDF

76.5 KB Created: 2021-02-18 01:30:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3cea91500d8ef12d728baecde8bd2809 SHA-1: a070158cfdebd56e5505d1ad0a0ba55e059f433a SHA-256: 5e09dfe62ef5063ebeef096afbe329b15e5612d081e26e808e475845238f8365
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are associated with link farms or potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, appears to be a lure related to job opportunities, aiming to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/123?utm_term=what+jobs+can+you+get+with+an+english+literature+and+creative+writing+degree PDF link annotation
    • http://olipaka.xyz/team_extreme_cracked_minecraftapvqg.pdfIn PDF document text
    • http://verification-help.com/9108053532f6y3x.pdfIn PDF document text
    • http://detonic-ordina.website/temple_run_2_lost_jungle_unlockds1h6.pdfIn PDF document text
    • http://tiktokfrance.fun/contrato_de_apertura_de_credito_mercantil_formatomuome.pdfIn PDF document text
    • http://arbitestpark.xyz/zufobusiluwujarusuvejobem6m4d.pdfIn PDF document text
    • http://tojenan.iblogger.org/7th_gen_amd_pro_a4-_4350b_apu.pdfIn PDF document text
    • http://4d-5d.com/36422094170foi02.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/727336bc.pdfIn PDF document text
    • http://gufutaca3.xyz/tencel_sheets_king6vmqv.pdfIn PDF document text
    • https://pawikewam.weebly.com/uploads/1/3/4/4/134445239/lovimopudebuz.pdfIn PDF document text
    • http://mixit.info/gameboy_color_emulator_gamesryet9.pdfIn PDF document text
    • http://kieverts.xyz/deguvorimujeporsk7v.pdfIn PDF document text
    • http://yewes.fun/fegoresekaxe5ry80.pdfIn PDF document text
    • https://dapazigozasonim.weebly.com/uploads/1/3/4/4/134466252/2914975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jinabom/3651760562.pdfIn PDF document text
    • http://nawogov.epizy.com/242384423.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/rasumogisemevunarimakir.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/268718818.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/23026314496.pdfIn 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_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 5684 bytes
SHA-256: 745b0d2b1b8feb2a29d2c16751c2b3091b520f6a48618f35aed1bba82dd62357
font_01_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 10456 bytes
SHA-256: 39b34693fdeca77afd9c72a484aca7e340fa896273d3f3d5198372a170c365b9

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