Malicious PDF — malware analysis report

Static analysis result for SHA-256 8719a4ac4107492f…

MALICIOUS

PDF

78.1 KB Created: 2021-03-31 02:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0bc1e2392839cf86f7d8bf97f0a7ef2 SHA-1: 204a39d3b76e9e4874de14fac63843128a1ec4bb SHA-256: 8719a4ac4107492fe1e33536c7bff6bd44767a87ef4a136ba31868fc244f569c
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to an 'offer announcement', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=offer+announcement+format
    • http://nifimoperokoj.medianewsonline.com/arduino_programming_projects.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b415498d-b3eb-48cb-ac81-fc2d42ba368f/jonametunodexesos.pdf
    • https://uploads.strikinglycdn.com/files/33844784-4a45-4a21-955f-04ba06d6b081/nicholas_sparks_two_by_two_reviews.pdf
    • https://uploads.strikinglycdn.com/files/edc277d1-7b6f-4145-91ba-779d38556561/el_dador_de_la_vida_biblia.pdf
    • https://uploads.strikinglycdn.com/files/666f348e-0b2f-4e3b-a3af-977808725fe9/whats_in_the_sky_tonight_canada.pdf
    • https://uploads.strikinglycdn.com/files/31eb5284-24e0-4b9f-8da8-f471ba49a094/probability_practice_coloring_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/658dc8a4-52e6-41ac-bad3-b57b2a30eada/how_to_strengthen_shoulders_without_weights.pdf
    • https://uploads.strikinglycdn.com/files/45fe3a12-4c97-431f-be32-185567c525dd/lageraxigugelajojapafada.pdf
    • https://uploads.strikinglycdn.com/files/92a243b6-c84b-4af5-b5a3-fbceff922648/53633800791.pdf
    • https://s3.amazonaws.com/pipaneku/wodovulivamave.pdf
    • https://uploads.strikinglycdn.com/files/0b7be514-9fbd-4db9-8743-fa3059c0f044/acordes_de_dust_in_the_wind_para_guitarra_kansas.pdf
    • https://uploads.strikinglycdn.com/files/5144977b-ffc5-43c7-908d-87d692e32913/m_audio_fast_track_drivers_mac_sierra.pdf
    • https://uploads.strikinglycdn.com/files/9c8fa9f5-09be-4316-a8ac-46d4654b7915/91472764170.pdf
    • https://s3.amazonaws.com/falevi/electrical_engineering_technology_control_systems_salary.pdf
    • https://uploads.strikinglycdn.com/files/e154c543-f1a5-4577-8f21-84bf7c8e8d06/30017331132.pdf
    • http://dijipola.onlinewebshop.net/dewisigaloju.pdf
    • https://s3.amazonaws.com/kawotexulozax/rivinunetitozumeluw.pdf
    • https://uploads.strikinglycdn.com/files/a599b02d-de52-4053-a017-1c85d21a2733/49339479489.pdf
    • https://uploads.strikinglycdn.com/files/5695d797-668b-425c-9ee9-9c224272b96e/kawasaki_engine_oil.pdf
    • https://s3.amazonaws.com/rerinago/team_organizational_structure_template_excel.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/2200478360.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_off0000f4fc.bin
bb553a89f93b4f67644f7360a7136df91c5b1169479da806e17d5da45796e02d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 4844 bytes
font_01_sfnt_off00010564.bin
a71dab7c6a77eb706cb255a326db5dd857ef1e32cde6171290622be0d952d65d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 11180 bytes

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