Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce30fc4c0ff7c8b…

MALICIOUS

PDF

79.9 KB Created: 2021-03-27 20:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f84c547324c6edeb35e30b035acabf82 SHA-1: 08634599e81c7b2fb139f08f5dfd13b069df91ad SHA-256: fce30fc4c0ff7c8bcc82e4904047ff04f3c1dc37376b8a788f2885815cae169c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to 'gimoguvi.ru' which is presented as a '3rd grade vocabulary activities pdf'. This suggests a social engineering lure to trick users into visiting a potentially malicious site. The presence of embedded URLs and the PDF structure indicate it's designed to redirect users, likely for phishing or malware distribution.

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://gimoguvi.ru/award?keyword=3rd+grade+vocabulary+activities+pdf PDF link annotation
    • https://cdn.sqhk.co/tedubifo/ijhaRib/famarevozisevonamilutawov.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/agrger_deux.pdfIn PDF document text
    • http://muzojumovove.iblogger.org/28025733909.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwojosop/2Dia2Ab/red_rose_pizza_cincinnati.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/ronalixunopuxafiro.pdfIn PDF document text
    • http://kekajavulaj.iblogger.org/dinukam.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/76585874460.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/gutixob.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/design_diaries_creative_process_in_graphic_design_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/girhfTk/rabereso.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/florida_ballot_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/Szjhjis/43477441316.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/zjhjitC/89930183994.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9d2592de-e5d6-4d3c-bc4d-80ff4952e386/shark_ion_robot_vacuum_r85_vs_750.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/rudelaxodaniromor.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/adobe_reader_free_download_for_windows_xp_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/month_name_in_english.pdfIn PDF document text
    • http://jonegukum.epizy.com/binomial_expansion_worksheet_with_answers.pdfIn PDF document text
    • http://kusilip.epizy.com/how_to_use_zoom_mute_microphone.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/2942156.pdfIn PDF document text
    • http://telifujovemevo.atwebpages.com/the_crown_season_4_episode_5_year.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/19658029567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70979a2-b535-4122-b571-9a49ac2a4ec0/jetojikorolajunitevurezu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD0 5472 bytes
SHA-256: 5917c1acc9d5836fe01020f5fd050fd69dbe942f66a35595e1a0d4020afec647
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 10840 bytes
SHA-256: e4a72617a9b6817dbcc84f8e1e993ddb3cc9488fffad3230f34182055a9b4fdd
font_02_sfnt_off00012397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12397 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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