Malicious PDF — malware analysis report

Static analysis result for SHA-256 760bea4d83a27d23…

MALICIOUS

PDF

81.4 KB Created: 2021-03-16 08:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7c87bb90ba5cde2cc7b0ebbf0e5c1df2 SHA-1: 5592a1c73ebd27c975b0ae518dbaaf841e2a1469 SHA-256: 760bea4d83a27d2329ed472a958d1c5a526f282e6f063d9907bffcf4a1993448
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous external URIs, with one specifically identified as an external URI pointing to 'https://bologen.ru/award?keyword=blank+brochure+template+pdf'. The PDF also functions as a link farm, directing users to multiple distinct domains, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the overall structure and URL distribution indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/award?keyword=blank+brochure+template+pdf PDF link annotation
    • https://cdn.sqhk.co/tibakekavero/bgeidif/pool_city_game_free_download_for_pc.pdfIn PDF document text
    • http://mamontov-net.cc/bokepukexugubanawofx5nro.pdfIn PDF document text
    • http://ig-mediateam.net/dslr_background_image_full_hd4gpwm.pdfIn PDF document text
    • http://rodina38.ru/how_to_identify_a_diode_using_multimeterrwr80.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/nugosezaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/7fghUij/98846825095.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzikago/iaCFDij/ijazat_video_song_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/Y4WRQai/netspot_wifi_analyzer_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/jejeWgc/sonic_the_hedgehog_ariciul_supersonic_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_0088d190c664417995618c04a8789099.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_d71877aae8a149daba5efc043d3f8b2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9abdb1-e208-4f35-8878-474256d54a43/5623241974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac806cf-89ee-4136-a537-43a6f889924d/33590702534.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/what_intermolecular_forces_are_in_ammonia.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/tamakuvipezovafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df90bfa-9a05-4855-8d87-acb23d264201/char_broil_2_burner_infrared_grill_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d33427-60df-40a8-8f41-ce2097b34438/sakigefifovatatud.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_57654941fec3464584c995c1474bbcc6.pdf?index=trueIn PDF document text
    • http://vefodipox.myartsonline.com/lc-60le600u_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/18747260435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed6dca0-293e-4f5d-af11-151838a639c4/toastmaster_advanced_manuals.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 5468 bytes
SHA-256: 8e0455a37e169b47cc626c6a1a4414b0b1ecb8d23f6805336fac4aa965473b28
font_01_sfnt_off0001123d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 10916 bytes
SHA-256: 0f09779e2d64667530acb4b710659f9bd37fb9016137a6e5683dc7854c6f1c95

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