Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8da65379651b36…

MALICIOUS

PDF

86.3 KB Created: 2021-03-20 18:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 764c418975334b26baf2d02359a325eb SHA-1: 4a616700cd9a79174fba03ee43e82485af39851b SHA-256: cc8da65379651b36a4ed077cd2e7bc420aa4f61cfc9438c0b84e95ec83419108
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to a suspicious domain ('lozipotod.ru') that is likely used for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. ClamAV detection and ML classification confirm the malicious nature of the file.

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://lozipotod.ru/wix?keyword=rees+howells+intercessor+book+pdf PDF link annotation
    • http://wisatemubudu.medianewsonline.com/how_old_was_the_cast_of_vampire_diaries_season_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_60247c23005aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460968/normal_600eb8a95cb00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5ff6514bcdbe3.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/87267402393.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f8c8a2-bca7-426a-9a32-58f7f904d903/100_verbos_irregulares_en_ingles_y_espaol_en_presente_y_pasado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ff6de3-8c2a-4218-a106-8764298e821a/whirlpool_front_load_washer_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/zepoduneguwav.pdfIn PDF document text
    • http://kafogateginoni.epizy.com/oxford_medical_dictionary_for_pc.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/fisicoquimica_atkins_6ta_edicion.pdfIn PDF document text
    • http://lixutepojux.rf.gd/spotify_win32_application.pdfIn PDF document text
    • http://zivuvosiz.epizy.com/zaxonezubowonaj.pdfIn PDF document text
    • http://kadegezopofog.rf.gd/corbett_maths_5_a_day_answers_april.pdfIn PDF document text
    • http://molamizaxe.epizy.com/boundaries_henry_cloud_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/blueant_pump_zone_wireless_hd_headphones_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd1d83a-4e14-4d44-b69a-a426b83b37e6/how_do_i_fix_my_acer_tablet_it_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/burlington_township_water_quality_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/proscan_32_inch_tv_plded3273a.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/blur_background_android_editor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/babb1d4b-3d47-4fd8-8d7a-4feaa2457f25/tufaworusutozekolagup.pdfIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/animal_adaptations_worksheets_4th_grade.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_off00011124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11124 5336 bytes
SHA-256: 30f684901133776f5fdad1ca9f7c97e41123bc826d26a691b68ccd4f2d44c2a4
font_01_sfnt_off00012359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12359 11580 bytes
SHA-256: b71edd799b5c0b6c27831a3934703b703b14eb3af242b8cfa6a79390961793e7

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