Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33fc3537e0e068a…

MALICIOUS

PDF

85.2 KB Created: 2021-03-23 00:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eba879505c99e3d339052f6a0f03019 SHA-1: 25704ec8bbb31d88a93f11ff826fa3dbb6b64251 SHA-256: e33fc3537e0e068aeb96b07760c8d3a08d626d27d38698f675ce80d31f2cccdd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Algerieinfo journaux pdf'. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=algerieinfo+journaux+pdf
    • http://dukobotabagujam.22web.org/zaxajonas.pdf
    • https://sinukunub.weebly.com/uploads/1/3/4/4/134431456/a2e57e.pdf
    • https://cdn.sqhk.co/rugugojeba/ZLXihcN/rocket_power_one_liners.pdf
    • https://sivitudogadix.weebly.com/uploads/1/3/4/1/134108631/4998560.pdf
    • http://www.algerieinfo.com/home.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wefuzage.epizy.com/3986733580.pdf
    • http://sukorijemitij.epizy.com/algebra_y_trigonometria_addison_wesley.pdf
    • https://uploads.strikinglycdn.com/files/976f755d-ca6f-453b-bc97-6f8a4300b70c/how_long_does_it_take_to_heal_your_body_from_smoking.pdf
    • http://bodagoge.epizy.com/words_to_describe_trees_in_a_storm.pdf
    • http://xetumerim.rf.gd/chemistry_calorimetry_problems_2_worksheet_answers.pdf
    • http://vebavibokifoko.epizy.com/jio_4g_voice_call_software.pdf
    • https://uploads.strikinglycdn.com/files/0203e734-f8fb-41b7-b8ca-275c17050db8/sowizujuxal.pdf
    • http://nupatugo.epizy.com/auto_body_repair_technology_6th_edition.pdf
    • http://kusokexefutaj.epizy.com/farsi_to_urdu_dictionary_free_download.pdf
    • http://dexedigobejo.rf.gd/new_bollywood_movies_2018_bestwap.pdf
    • http://xutunebel.epizy.com/apple_system_log_asl_messages.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011754.bin
e1cd0f2e56c7fc318fe12f772757d45d17c0c93ce17433f78bcbd6e34b7bb2eb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11754 26384 bytes
font_00_sfnt_off0000df74.bin
3c61f62381bda8ad5c47f71d1904754d1fce679288233d7c6c7027d9a4a665f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 5164 bytes
font_01_sfnt_off0000f124.bin
3c5ca057e20e599bc3ccf065fab9f1120324d13d169a5d0f3868b1a12462a897
pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 11704 bytes