Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47265c7dbcc811e…

MALICIOUS

PDF

72.7 KB Created: 2021-03-04 19:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6b98cbdb5ea026329d1ae0cedf16a95c SHA-1: 68508b42218ccd7deffceca8a54edcfb33136657 SHA-256: f47265c7dbcc811ee0b05375b61a53282b1a64a06ca38d0efe8bc4f8dee62eaf
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/wix?keyword=drawing+conclusions+geometry+worksheets PDF link annotation
    • http://lnstagramsupportingcenter.com/depopudalaxebugabaf0uf2.pdfIn PDF document text
    • http://xrootunited.com/miracle_box_frp_unlockrkizn.pdfIn PDF document text
    • http://pesugesilufafa.iblogger.org/how_to_quote_when_paraphrasing.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/sigajofawokelazegosil.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/45774795357.pdfIn PDF document text
    • http://white-x.fun/unix_and_linux_system_administration_handbook_epubhci8c.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/21319004317.pdfIn PDF document text
    • http://yandex-dostav.ru/dovirebulitoxevxyn9f.pdfIn PDF document text
    • http://beamorem.com/how_to_do_a_good_bar_chord4stto.pdfIn PDF document text
    • http://lixufejogesapu.22web.org/46945882559.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/bufexa/30368873563.pdfIn PDF document text
    • http://zesezajuterop.epizy.com/rawizazunomulowom.pdfIn PDF document text
    • http://bobiwerebidil.rf.gd/tukujuwetitowafuradal.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_e49161392ded404a854df6beb6a217e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/99673514435.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_826709e9bb494d4dbf4574af545ed6c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/believer_remix_song_free.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_2db4d51f2dc540b3adea5189fc72c092.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/aqa_gcse_dance_examiners_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/vuzodinuzawedonofinomow.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_a6531d7c946147b39593be307a9aff0f.pdf?index=trueIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_8fa16e7685cb4fa795129c85f2c3b09b.pdf?index=trueIn PDF document text
    • http://lugirike.epizy.com/r_for_windows_3._5._3.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/facebook_lite_ios_apk.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_off0000dfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCD 5468 bytes
SHA-256: 631022aec313cc43326e6d2eb14086390926d7a29c7ffab4169aad93fee9b498
font_01_sfnt_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 10148 bytes
SHA-256: 4b35ca91543a7608eb9977a0bc5005add625c493bf28ce177d50e39b5d3487b6

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