Malicious PDF — malware analysis report

Static analysis result for SHA-256 2528b94fbd6d28e1…

MALICIOUS

PDF

73.4 KB Created: 2021-02-13 01:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 70980bd02d024c922367a4e965bbfd7c SHA-1: 0f82a6c137efe53c6442b6915662be0ed92b7022 SHA-256: 2528b94fbd6d28e167b4b0dcdd3d2e5ac61cab02be34b153a5f7de02d33dc6dc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to a 'clutch tuning handbook PDF', likely a pretext to encourage download or interaction with the embedded malicious content. The presence of external URIs and the overall detection by multiple security tools indicate a phishing or malware distribution attempt.

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://crophysi.ru/123?utm_term=olav+aaen+clutch+tuning+handbook+pdf PDF link annotation
    • http://lnstagram-copyright-confirms.com/wesiguwukotegonogewivilepmj89j.pdfIn PDF document text
    • http://laxelenokuro.22web.org/nfl_schedule_week_7.pdfIn PDF document text
    • http://wisumezuj.22web.org/kagas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wupenokisu.epizy.com/wisimi.pdfIn PDF document text
    • http://xolemobubusosi.rf.gd/745386725.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/2d_game_background_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/pebadugumefiwet.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/best_photo_collage_app_android_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/78435211715.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/nimaposulofipawe.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/37476557963.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/gizixa.pdfIn PDF document text
    • http://badizep.epizy.com/mesowupivovaseluwan.pdfIn PDF document text
    • http://xinedebasutusaz.rf.gd/76545204170.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/gegagowozilobem.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/koxobuvoxuxepibowe.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/game_animus_stand_alone_apkpure.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_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 5432 bytes
SHA-256: 34315af679bf31861a37d92e64f8e6929a4df6303b176b7775ba7b71f2e57c55
font_01_sfnt_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 10992 bytes
SHA-256: 224b5b57a55c8195c83f0ab62416ec70f9d74dc5338591f8e95ade39e63ac1e4

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