Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df5adb26e50c54d…

MALICIOUS

PDF

77.1 KB Created: 2021-03-08 22:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfc435947ff61ec6fa7b2c6c4a2fb472 SHA-1: 574f1873681734430e4e6ea9126fd52e84f0f1ac SHA-256: 4df5adb26e50c54d23c73f1fa188e0431f6cb602234b05a5066dde5a0ca307fd
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely part of a phishing or social engineering scheme. The document body, though heavily obfuscated, suggests a lure related to software or awards.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=assembler+plusieurs+pdf+foxit
    • http://muziwavesos.iblogger.org/93318106098.pdf
    • http://natur-bio.space/bonobobofexctv4s.pdf
    • http://xevanaz.iblogger.org/tebakedigovadivuvabip.pdf
    • http://faguduni.22web.org/how_do_i_reset_my_scansnap_ix500_wifi.pdf
    • http://heretythere.site/fire_in_the_hole_elmore_leonard_wiki6xfe8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dokubuxopid.rf.gd/afro_house_sample_packs_free.pdf
    • http://beviraveda.epizy.com/how_to_become_an_effective_public_speaker.pdf
    • http://nanedivelewiwi.epizy.com/61708329731.pdf
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_1b4cdf5a77c24e3fabf8979782e3158b.pdf?index=true
    • http://lumuwejonalar.epizy.com/fukabenugukusibekatexir.pdf
    • http://joxumokuri.epizy.com/bts_guidelines_community_acquired_pneumonia_in_adults.pdf
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_d8eab26ac2614bb09678584f23dfcaf9.pdf?index=true
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_696ce116e49d40ccb1a15ce77d081ef6.pdf?index=true
    • http://kazixovo.rf.gd/gijuvufenenuri.pdf
    • https://s3.amazonaws.com/rokuwapesu/so_too_either_neither_printable_worksheets.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_ae042f6cbaf24f9c989615a120b9836b.pdf?index=true
    • http://vujofif.epizy.com/comparative_adjectives_worksheet_year_1.pdf
    • http://gidimuni.epizy.com/non_conformity_report_ne_demek.pdf
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_4c23ff40ce394abc9112b46edc6c638f.pdf?index=true
    • https://s3.amazonaws.com/debamijizozexo/recent_technology_in_building_construction.pdf
    • https://s3.amazonaws.com/warapagefasovi/f_a_d_ka_full_form.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3a.bin
03aa88ddb0f8fba05de8e9150ccaec01346981b07eb4594f778a1b444a57c800		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3A 5172 bytes
font_01_sfnt_off0000fcb9.bin
988abcc1a94ba7cfbe108db2e25c306c3816d4f859cc9222dc6e7254e767fe62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 13104 bytes

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