Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fae2314b2326a0…

MALICIOUS

PDF

84.4 KB Created: 2021-03-18 06:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be731f94d8addc63e164bd3b56061445 SHA-1: a3e8a93200334c92ebdb8ecd6e4144674bc402cf SHA-256: 28fae2314b2326a00e625f5c9761f29799e12c35e7a4e74b1e3b902f9a8420a2
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'pelibifir.ru' suggests the document is designed to redirect users to a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/123?utm_term=ayyappa+songs+com
    • http://vesonukajew.iblogger.org/53481374993.pdf
    • http://blog-millionaire.buzz/9438746362rdk7o.pdf
    • http://o-karte-kopilka.com/xetesamofishrn5b.pdf
    • http://lnstagramverificationbadge.com/best_vi_command_cheat_sheetaowfp.pdf
    • https://cdn.sqhk.co/zurefaxenov/tnjjghc/2729493878.pdf
    • http://arenaprobet.com/pibotonomosojubajajadw1hco.pdf
    • http://yozi.store/dagidix3l02f.pdf
    • http://vivunijasu.22web.org/ignou_assignment_name_page_format.pdf
    • http://goproits.com/serial_de_instalacion_windows_8.1_32_bitst2sro.pdf
    • https://cdn.sqhk.co/zifiguwosu/sighgrr/semumaxamifipij.pdf
    • https://cdn.sqhk.co/ruzaxube/Q3S9jbi/retroarch_xbox_360_controller_config.pdf
    • http://evakuator-uga.ru/how_to_install_minn_kota_i_pilota3i9x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mivogunav.rf.gd/15949256070.pdf
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_1c8aaa5c9c264f2ca8efbf27e986c62c.pdf?index=true
    • http://doxilotosifoku.epizy.com/xaremajutesukitujam.pdf
    • https://s3.amazonaws.com/dagasopones/45577166556.pdf
    • https://s3.amazonaws.com/kawotexulozax/amor_amor_amor_song_free.pdf
    • https://s3.amazonaws.com/jagux/91399899875.pdf
    • https://s3.amazonaws.com/xefejevife/velid.pdf
    • https://s3.amazonaws.com/fomaralunex/xurenegokaxiforilapopige.pdf
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_54283c38b1b54dfeb5fcb204c57da7b3.pdf?index=true
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_fe7c27b1550f4f15a9ae4fc79ba6b22e.pdf?index=true
    • 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_off00010aa3.bin
4ded9cc85055bf88937feadbc51ffa07f06fc3f4ac15e12b936b7f9d23ae483c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA3 5216 bytes
font_01_sfnt_off00011c69.bin
4911b79bc960e438f2ffa70d39d5ad7e76a768e5ddba18ab40c56d9617de70b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C69 12044 bytes

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