Malicious PDF — malware analysis report

Static analysis result for SHA-256 87da39ee5cc688fa…

MALICIOUS

PDF

69.8 KB Created: 2021-02-18 22:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b2ef96556dcb532ec09b1bac00c81f5a SHA-1: d3e181a8998748d90f5cc5bae25effa240e614f5 SHA-256: 87da39ee5cc688fa9e682fb56d411de7ba495d947c682eb1914f0324c3deabd5
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. The document body, though heavily obfuscated, contains text related to unit conversion, suggesting a lure to a phishing or malware distribution site. The embedded URI points to a suspicious domain, likely serving as a landing page for the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=cuanto+es+un+metro+cuadrado+en+milimetros PDF link annotation
    • http://emmetrix.net/creepy_don_t_touch_my_phone_wallpaperxj27a.pdfIn PDF document text
    • http://store50off.info/nuvutewesesozofojd2e61.pdfIn PDF document text
    • http://flowerport.store/68131510748mv2sk.pdfIn PDF document text
    • http://lefuvaguvupawax.iblogger.org/bevorapopogatalo.pdfIn PDF document text
    • http://triple-doska3.club/film_architecture_101_480pafydi.pdfIn PDF document text
    • http://discount50it.pro/riccar_sewing_machine_manualegthz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_6018db6a82e6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468296/normal_60003e4325867.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5ffc851115a71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446925/normal_601aa90e2ca9b.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/legobegutulo/vosuvilakidufebonelavukew.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/21343252332.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/aeroponics_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/cusco_peru_tour_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/bookman_jf_swash_b_font_free.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_off0000d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 4992 bytes
SHA-256: f7ac0777c00d9537892d0170eecc25b0e21c0d258e18dcaa06badc7749545fde
font_01_sfnt_off0000e59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 11172 bytes
SHA-256: a7748ef55d94f30f3fed7068fbf314471a4f5fe8548cfe32605a98ba14bc6e94