Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafcb19b2ff8a4fd…

MALICIOUS

PDF

78.1 KB Created: 2021-02-27 02:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f5bd494f37315f01eb6a253c514987bf SHA-1: 75932435f140d14edf4d4f62ce7a479c09826383 SHA-256: cafcb19b2ff8a4fd1edd1f29b04937db8346307a76830bb2a3c502697a19de3f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a chemical formula search, aiming to trick users into visiting the malicious URL.

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://midufefew.ru/award?keyword=molar+mass+of+nac2h3o2%252A3h2o PDF link annotation
    • https://cdn.sqhk.co/linotepibubi/dykggR7/befuzazatalopamugedi.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/57826248856.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/g0e7Shf/divukuvabimisuxaroke.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/sm-t350_lcd_screen_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/YMggjbL/navneet_rana_party.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/rimejiguvif/tafemowesadi.pdfIn PDF document text
    • http://poteluvomak.rf.gd/didubesukibijurugu.pdfIn PDF document text
    • http://vejimugar.epizy.com/android_brown_noise_generator.pdfIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/regikivinu.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/netflix_for_android_tv_kitkat.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/sejujob.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/average_salary_for_a_communications_manager.pdfIn PDF document text
    • http://dapodakek.rf.gd/44940363518.pdfIn PDF document text
    • http://joxamemi.epizy.com/pexonalapanin.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/sig_sauer_p320_holster_safariland.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/mujad.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_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 5488 bytes
SHA-256: dde42c52fe13be39c5fd86da0dbe6c898c8f0c08ec1ce9da21997eefa3c99bb5
font_01_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 9976 bytes
SHA-256: 516fb60564a84e70e19b3b40e796db8920f297b84094ae50d4ee3fbdc94dede7

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