Malicious PDF — malware analysis report

Static analysis result for SHA-256 a421c0b7bb39ca59…

MALICIOUS

PDF

75.0 KB Created: 2021-03-11 05:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 951eefb2c00f4eb5d9bd114be7fc1b60 SHA-1: 7602dc2efd9fb995202a15b749f430d17411d76e SHA-256: a421c0b7bb39ca599fc9259a6db03e77b13f76a99e7f027c600e4e7110d38556
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to research design, aiming to trick users into visiting the malicious URL.

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://seumenha.ru/award?keyword=ethnography+research+design+pdf
    • http://reestr.site/scott_cycling_clothing_size_guidetp3zp.pdf
    • https://static.s123-cdn-static.com/uploads/4448551/normal_5fc9a4844f58c.pdf
    • http://martakkord.ru/the_monkeys_paw_middle_schooljlvsz.pdf
    • http://freshka.fun/52324294044qzkcb.pdf
    • https://static.s123-cdn-static.com/uploads/4382781/normal_5fee6cd94343f.pdf
    • http://teksalon.xyz/deva_shree_ganesha_agneepath_song_songs._pk45750.pdf
    • http://re-capital.ru/18630683361un0o2.pdf
    • https://cdn-cms.f-static.net/uploads/4425726/normal_60229930e13a0.pdf
    • https://static.s123-cdn-static.com/uploads/4419637/normal_5fe2692fcc7b1.pdf
    • http://hookup753.fun/vizio_e600i-b3_main_boardhonl0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e74728c4-63dd-44d1-9583-e702871939b6/12_week_strength_and_conditioning_program_mma.pdf
    • https://uploads.strikinglycdn.com/files/aede285e-d820-48d7-ac5c-0d576edda9b0/samsung_smart_tv_remote_control_battery_replacement.pdf
    • https://s3.amazonaws.com/votuweroxigezog/16038769906.pdf
    • https://s3.amazonaws.com/vapelurowar/84064184164.pdf
    • https://uploads.strikinglycdn.com/files/77bfbb1d-fa5d-4d4a-b942-230afc9288b8/microsoft_flight_sim_2020_xbox_one_release_date.pdf
    • https://uploads.strikinglycdn.com/files/c5f21607-04df-4f9e-ba37-466ea188c7d7/kotozibejamuxe.pdf
    • https://s3.amazonaws.com/ganubifirigevi/69956267352.pdf
    • https://uploads.strikinglycdn.com/files/5606b6a0-3fa8-4ffa-b92c-2ced3b9b1011/getezosuwiz.pdf
    • https://uploads.strikinglycdn.com/files/57cafe81-0160-493c-bbd2-34f0fc9d77f7/are_beats_studios_worth_it.pdf
    • https://s3.amazonaws.com/kibavutibeved/canon_rc-6_remote_control_manual.pdf
    • https://uploads.strikinglycdn.com/files/e0cea5fc-6908-4c92-bece-7836715060f9/how_to_change_level_on_jumperoo.pdf
    • https://uploads.strikinglycdn.com/files/73ae3510-448e-43ce-a76b-c8fecb41d8f9/jisibalamavijiju.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_off0000ea3c.bin
e5bcee7bb74b1044aa872afa8c342cd5ba5d74ae824bb44f7976fe6749dafd56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 5444 bytes
font_01_sfnt_off0000fcca.bin
c7e374d40b5167d044ef03040857032cb2306ab525d3a0acbc72a51cd9682b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCA 9972 bytes

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