Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3705386050e139f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-17 15:35:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cce44d8ca267af444cdf26b1eeeac39e SHA-1: f1b6f415e6c6998f7028a8127fe34570b1bfbcde SHA-256: d3705386050e139fe13247e892d1d6bb46430d3d5394d6df7e9a034dc55310f4
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with at least two pointing to potentially malicious domains ('golowaki.ru' and 'zipubezexupoka.mywebcommunity.org'). The PDF structure and embedded content suggest it's designed to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=attenuated+total+reflectance+pdf PDF link annotation
    • http://zipubezexupoka.mywebcommunity.org/73089660050.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/pamokamigidadotokipapup.pdfIn PDF document text
    • http://dkblogin-de.best/83881304048tkacc.pdfIn PDF document text
    • http://wisitens.online/crescent_dough_sheet_recipes_with_chickensakx1.pdfIn PDF document text
    • https://vekaforu.weebly.com/uploads/1/3/4/7/134747957/pikunupago.pdfIn PDF document text
    • http://dkblogin-de.com/rhino_tutorial_for_beginnersrug22.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/kobigiwowanulomam.pdfIn PDF document text
    • http://fajutixosisi.22web.org/rurasutupijefomifisuzonip.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/football_manager_2020_wont_launch_on_mac.pdfIn PDF document text
    • http://youla-24.cc/wd_my_cloud_ex2_ultra_12tb_reviewt5sud.pdfIn PDF document text
    • http://tafasizogir.22web.org/bmi_calculator_kg_cm_chart.pdfIn PDF document text
    • http://grigolia-studio.ru/how_to_install_hot_water_heater_in_travel_trailerkxoh4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitodake.myartsonline.com/watch_pride_and_prejudice_and_zombies_online_free_dailymotion.pdfIn PDF document text
    • http://faganelatoke.epizy.com/tecumseh_tc300_repair_manual.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_5d2d6b8e9d914d1ba24080135371593c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rowubunak/fazomowa.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_d9f40159cafb49a78fa8ed0edab5b13e.pdf?index=trueIn PDF document text
    • http://vosoximulitit.rf.gd/ludazelokesoror.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_7e6c9307d8014701bf1dabb2f1a71232.pdf?index=trueIn PDF document text
    • http://vidabovon.epizy.com/rodafifevolamux.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/bulevekoximigasukarato.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/accounting_manager_cv_template_word.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_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 4960 bytes
SHA-256: 420d55fdb3a5265ef268bbd0480feb954b9c583d67e9053abd9cee4970bd00b4
font_01_sfnt_off0000fcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 11688 bytes
SHA-256: 1243111b04197cf582b102c708d119e62b0d8a272dd8a8fdf0b2aa9d559baa5d

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