Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70311437d03554d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 04:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e9de33b6dd61105a17634c1508a2758 SHA-1: da7caefe3d1da74e63453fc57dd8f25ecd76bf01 SHA-256: e70311437d03554d2754149ec7a9c46b8dbe3d3e1e11fe0ffb6e0227331f20ca
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to 'dell digital delivery application' to entice users to click the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=what+is+dell+digital+delivery+application
    • https://static.s123-cdn-static.com/uploads/4481985/normal_6003b25023cc5.pdf
    • https://cdn.sqhk.co/kukisigafumi/eicjfic/6381938917.pdf
    • https://cdn.sqhk.co/vixawutozama/RS4gijj/f1_mobile_racing_download_mod_apk.pdf
    • https://cdn.sqhk.co/pefapalotux/awhe4hf/silicon_valley_season_7_finale.pdf
    • https://static.s123-cdn-static.com/uploads/4383475/normal_5ff06d4f4cfbe.pdf
    • https://cdn-cms.f-static.net/uploads/4458625/normal_6011b846a37d7.pdf
    • https://cdn.sqhk.co/dinigivo/jahajBx/fortress_td_1._2._30_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4446759/normal_602567c0c91f2.pdf
    • https://cdn-cms.f-static.net/uploads/4449987/normal_601bb3486d61a.pdf
    • https://cdn.sqhk.co/xonepogafix/ifP9VYD/2020_woodturning_symposium.pdf
    • https://cdn.sqhk.co/dodalowogiv/ibijCij/96457960482.pdf
    • https://cdn.sqhk.co/wenegifuteg/YjdpFHd/30627534166.pdf
    • https://cdn.sqhk.co/gabebutiz/qhbugcf/ctech_elm327_bluetooth_obd2_car_diagnostic_interface_tool.pdf
    • https://cdn.sqhk.co/wifavizen/pdhifib/vipejekiruwolidakosuv.pdf
    • https://cdn.sqhk.co/xalibolopov/cycYC9a/78712804943.pdf
    • https://cdn.sqhk.co/rasirise/gjjhgjj/go_longhorns_images.pdf
    • https://cdn.sqhk.co/gebemiwisero/iighidX/lifipusob.pdf
    • https://cdn.sqhk.co/xujanezujol/RhevDjb/vitesanezavebalupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zodererezuzuxi/vadodumubejamam.pdf
    • https://s3.amazonaws.com/pululusodogi/94763154886.pdf
    • https://s3.amazonaws.com/nokiva/tizoxawupademekur.pdf
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f447.bin
536d382431d9f57c5fd86018a96f2e6ce3977cbcf5acc8b34c4587a40c68a8b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF447 5508 bytes
font_01_sfnt_off00010718.bin
eba8e8767f5992ff6faade3e11d1d94a791c00ce4e33c9572e4240e7680d46cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 11016 bytes