Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada4ec585d278279…

MALICIOUS

PDF

77.2 KB Created: 2021-03-10 15:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ddd1836e605cefe41fa23d9bec02122 SHA-1: 178605eb4b5f7fa81ffe311b1b992bb6edf1e68a SHA-256: ada4ec585d278279226334a6440a96d77d72c14b730985a105148b11ff399347
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and embedded URLs, with one primary URL being https://nipisod.ru/123?utm_term=whirlpool+convection+microwave+oven+combo+manual. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nipisod.ru/123?utm_term=whirlpool+convection+microwave+oven+combo+manual
    • https://cdn.sqhk.co/zubejavaxuvu/fiahzy4/wolemebu.pdf
    • http://xevidome.iblogger.org/pegufomubikogokiludibu.pdf
    • https://cdn.sqhk.co/xewafazuk/vgfjeMs/39670562980.pdf
    • https://cdn-cms.f-static.net/uploads/4410441/normal_5fe8d24fc4b92.pdf
    • https://cdn.sqhk.co/lolajelor/beDgePh/best_peace_equalizer_settings_for_gaming.pdf
    • https://cdn.sqhk.co/lozukoxokir/ajgiegd/6241617934.pdf
    • https://cdn.sqhk.co/develezuwa/icCggvP/zefudufovixosibiful.pdf
    • http://marabape.iblogger.org/99021593264.pdf
    • https://static.s123-cdn-static.com/uploads/4371536/normal_5fddcb3355fe1.pdf
    • https://cdn.sqhk.co/wajuletixex/Ogcjeqv/fallout_shelter_wiki_rooms.pdf
    • https://cdn.sqhk.co/vexorikodo/ciih6je/93795191613.pdf
    • https://cdn.sqhk.co/xalibolopov/KEIheHl/aura_migraa.pdf
    • https://cdn-cms.f-static.net/uploads/4371023/normal_602d6846befe5.pdf
    • https://cdn-cms.f-static.net/uploads/4453336/normal_6015d2adb1e99.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xewamejixolefaj/does_swing_caddie_work_with_foam_balls.pdf
    • http://rubipupajet.rf.gd/59546254212.pdf
    • https://uploads.strikinglycdn.com/files/a48ba8b8-add6-444b-9415-b719db842979/38642844463.pdf
    • http://wibefiwijufet.epizy.com/egger_otoplastik.pdf
    • https://uploads.strikinglycdn.com/files/96a17384-3537-4f55-b865-d0f1395d4245/34741653027.pdf
    • https://uploads.strikinglycdn.com/files/a995512f-69d1-4f6b-b781-08cb635d3419/teraxegigisapen.pdf
    • https://s3.amazonaws.com/lupebesu/caged_system_guitar.pdf
    • https://s3.amazonaws.com/paxuvagal/how_to_get_poisson_distribution.pdf
    • http://zotuxegusam.epizy.com/miya_bhai_dj_video_mp4.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/kavekasobulamemenolotu.pdf
    • https://uploads.strikinglycdn.com/files/d3084736-2c73-4a5c-92f5-c59d584efa95/40296037175.pdf
    • https://s3.amazonaws.com/kodipopujufipig/vedojomudikuzemu.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_off0000ef90.bin
889a4011a60c3b0e5d1191b40371d56e5a915589886bd2971bb31c3e950c153b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 5300 bytes
font_01_sfnt_off00010182.bin
bde7f4bd800f5d2cfe87e034df2062faad47cf7eefb96c62387a8312c3aa4b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10182 10864 bytes

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