Malicious PDF — malware analysis report

Static analysis result for SHA-256 e680ba29d5be68db…

MALICIOUS

PDF

77.4 KB Created: 2021-03-19 12:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6464a45bb593a9977acb3f7b0b328d1e SHA-1: 29d840b6d3f9e7af55895173df7433f69432c70f SHA-256: e680ba29d5be68dba632218c9a74d422ae38004ab4d8630d8ec82ee27f43279f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests malicious intent, likely for phishing or malware distribution. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=canon+mx432+scanner PDF link annotation
    • http://astropsychology.website/2013_audi_a7_owners_manualbrz3n.pdfIn PDF document text
    • http://mazafaka69pussy.online/jusoxubatorolid3u4gw.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/b6jCJ7A/moto_traffic_race_2_multiplayer.pdfIn PDF document text
    • http://vinorama.fun/kepawogigokr043.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/annexure_3.pdfIn PDF document text
    • http://bossyonlinex.com/ge_universal_remote_cl4_codes_for_insignia_tv9278h.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/UgcS1pn/fefunazimomi.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/icjgkc3/shelter_island_san_diego_restaurants_yelp.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/adenosina_2020.pdfIn PDF document text
    • http://ulekschool.online/what_do_the_lights_mean_on_smart_drive_camerahq8ir.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/zobagajok.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/aNB2URy/86301067614.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/79153779702.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/39707028785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifofoxidil.onlinewebshop.net/how_to_connect_dell_monitor_to_macbook_pro.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_a2964491b8674a3f90dce960e91b3be2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/swiffer_wetjet_heavy_duty_mop_pads.pdfIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/century_ply_laminates_lookbook.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_b7e0f16555274d408b2c9181fb102ecb.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_ebf1a6a521714803b26f14fbf971977f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/extreme_networks_switch_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/plantronics_backbeat_fit_vs_2100.pdfIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_2f91b7c2a28e435c88f9240799394fee.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/la_octava_plaga_bernardo_esquinca.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_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 5272 bytes
SHA-256: 6aeaa3bcb8e10a924a991c0013714eb0cbd1210a29ca0b2d30993cdc9961feba
font_01_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 11936 bytes
SHA-256: 06c6701082e722a3e3669ca745c85e17a17d39c2196bc682123cfee563c35442

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