Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c946690ab944468…

MALICIOUS

PDF

72.5 KB Created: 2021-03-18 09:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8262dc58b98a9cbe76ad4f1f25ac7baf SHA-1: da22a98c273bd9c5514389a1f9be7b321c63acac SHA-256: 9c946690ab94446829c5466dd02b9f42761f144ffc37fa24e0f03d32abeef816
136 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and ClamAV detection indicating maliciousness. It contains an embedded URL pointing to a suspicious domain, likely for downloading a secondary payload. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may instruct the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nipisod.ru/award?keyword=californication+tab+solo+pdf
    • https://cdn-cms.f-static.net/uploads/4484609/normal_5fe94802316f9.pdf
    • http://thiswaytovogue.com/38697483642kyg77.pdf
    • http://migerov.xyz/teoria_de_aperturas_ajedreznm6j3.pdf
    • http://fibiver.mygamesonline.org/what_are_the_different_aspects_of_film_formats.pdf
    • http://menformula.xyz/freightliner_code_bh_33mi4o9.pdf
    • http://gekalam.22web.org/google_play_games_for_pc.pdf
    • http://suvonenexazu.mywebcommunity.org/mojopunogemowafaborewuw.pdf
    • http://kidiwutimako.mygamesonline.org/19762551779.pdf
    • http://koteyarn.moscow/76271556259jkzo2.pdf
    • https://cdn-cms.f-static.net/uploads/4415930/normal_600ba731dabd6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://laxolagodofomug.onlinewebshop.net/bacterial_artificial_chromosome.pdf
    • https://s3.amazonaws.com/wutisigila/instructions_on_how_to_put_together_a_graco_pack_and_play.pdf
    • http://katezoluvezile.epizy.com/vakepagazejofotari.pdf
    • https://s3.amazonaws.com/mejawiwomak/20214139506.pdf
    • http://jagodamafa.rf.gd/how_do_you_fix_common_computer_problems.pdf
    • https://s3.amazonaws.com/kujesulad/dish_network_tv_guide_nbc_sports.pdf
    • https://s3.amazonaws.com/firudegix/61862516284.pdf
    • http://pubabela.rf.gd/65376840935.pdf
    • https://s3.amazonaws.com/bupaxomu/how_to_thread_a_singer_futura_quartet_sewing_machine.pdf
    • https://s3.amazonaws.com/rovuweraja/64087343758.pdf
    • https://s3.amazonaws.com/jipowumat/anjaneya_photos_god.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_off0000ddfd.bin
f6832d5106d207779137c5635df13c98d62b286e51ff80744346ce7bf2ab5964		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFD 5196 bytes
font_01_sfnt_off0000efae.bin
f9fb4b7574efdbff097c525052dc123b81087b59158897710f4ffe76b7dbdb8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 10848 bytes

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