Malicious PDF — malware analysis report

Static analysis result for SHA-256 272e903bdebd7fb0…

MALICIOUS

PDF

71.6 KB Created: 2021-02-01 05:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bc7936e781c21c7c124685d664881929 SHA-1: 2f15077ffaeb1417a39565c641490a9b2eb14808 SHA-256: 272e903bdebd7fb063e89ef5917a4368ac8a3faf783a64c49a9b67b72e0a479e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI and embedded URLs suggests an attempt to trick the user into visiting a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=nottingham+college+number PDF link annotation
    • https://cdn.sqhk.co/vifewaxupito/hhjdjc5/logubutebunogamasinapeget.pdfIn PDF document text
    • http://nuverlites.online/police_panic_button_sound_effectqo1o1.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/6hf3gd9/tap_tap_dash_apk_ios.pdfIn PDF document text
    • http://zerkalo-fugicar.website/thomas_more_utopia_citationivm34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403676/normal_5fc7e668e4985.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403816/normal_5ffc8875653df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5ffbc4508e0bc.pdfIn PDF document text
    • http://twoup-viktoria.online/gumball_copycats_dailymotion2fp7k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381532/normal_5fe5edf0b0fda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_5ffefe6319266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5ff5150cdbfbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_6016311ebbcf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5ff1d49598fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fe8cfd947121.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5fc6aaeb4e011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5feb91788baf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5fd179f5273e1.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/ihidoIk/96735572805.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/ijgchfL/smash_champs_mod_apk_unlimited_money_download.pdfIn PDF document text
    • http://b0xberry.online/the_wire_720p_indexrrtfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481676/normal_5fc6bdb9a2d32.pdfIn PDF document text
    • http://sdek-24.cc/lisapakebzh1my.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB83 5144 bytes
SHA-256: 48d47fb1bb3dbf38a7d3d65b704b3c79720997dcde7b97df10b11b8a3f36afaf
font_01_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 10656 bytes
SHA-256: cebd8e2c0c973891b0fac4f613aad198d2febb09f4bbc20dd6e3991e43dae4b1

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