Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa414d336cedfdb…

MALICIOUS

PDF

75.9 KB Created: 2021-02-21 15:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e2aca7ff21f760fafe6e6ec845f62cb5 SHA-1: 52ece98590cbdb201845e62adb15083bf980ab1b SHA-256: 8fa414d336cedfdb5cfa72d5af05f1880f85c2d0062380470b1220cc2dfff0cd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/123?utm_term=how+to+teach+adults+spoken+english PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fcf60b591309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_601609953bce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_600c7a706f846.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/geMzLqa/tijikitogesivamewovozekoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_600dfafc692c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5fd17c4fb1caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_5fd9a4c111a62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_60068f83cabea.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/hchfgjF/olympics_2024_paris_logo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_60152f8974ff1.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/iijhpE4/car_driving_gt_stunts_racing_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_601760770ce3a.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/dUhf1t2/best_android_auto_music_player_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/ZXhhghD/21682040205.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/putelekireza/nixikaf.pdfIn PDF document text
    • http://tefolinum.epizy.com/5298574547.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/logitech_ergonomic_keyboard_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/amma_amma_audio_song_free.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_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 5356 bytes
SHA-256: a79e5cea65a9ec048921d7decf191a49008ba7bb53f2488886bc64a395fe7b2b
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 10352 bytes
SHA-256: 961dedc48c72a6bb04af12552360fec8355b95d44f58b5025202a985cde337c3

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