Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5ac3363564046b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-17 07:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9330be987df32346fa44330e95ede00f SHA-1: 2f7a3e584cda1958743417a12571d1fdb80f98c0 SHA-256: fd5ac3363564046b39d022a05690ea1078f04af92740e796407d3d583d08d675
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('vilenefex.ru') that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'applied multivariate data analysis pdf'.

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://vilenefex.ru/award?keyword=applied+multivariate+data+analysis+pdf PDF link annotation
    • http://theboldpantsproject.com/graphing_square_root_functions_worksheet_with_answers7ydme.pdfIn PDF document text
    • http://muzoc.xyz/58673707041ybcyj.pdfIn PDF document text
    • http://zafogititug.22web.org/bipudusiduvuwotosa.pdfIn PDF document text
    • http://org-fruit.space/asphalt_xtreme_hack_apk_obb11anr.pdfIn PDF document text
    • http://ottics.ru/banned_books_list5qari.pdfIn PDF document text
    • http://inter-kalinka.ru/76014641573wssn8.pdfIn PDF document text
    • http://giveaway2020.info/oracle_sql_substring_from_end1x7gb.pdfIn PDF document text
    • http://moscow-siberian-force.online/five_nights_at_freddys_pizza_board_game5ddup.pdfIn PDF document text
    • http://bojukekaj.66ghz.com/mesalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_a7485ec506bb476ab594de347aaeb7b1.pdf?index=trueIn PDF document text
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_558fc50ee13b4a16957501475c623084.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2320459-54bb-4d92-a4ab-927c380bb80c/tadusolenudapuzuvadeni.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_e80b927377634aba89d95356d0ff9d09.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_226806692c084d18bbb10cc767c557f4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c8cef1-e402-46af-8a42-f4f47f4a8825/20824953775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fb3e47-ad7d-40a0-8eb7-9620c64fbc86/zogofiximimise.pdfIn PDF document text
    • http://zalikizo.epizy.com/block_story_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5674df76-ec08-4bb9-93db-7421c67ef278/37343839428.pdfIn PDF document text
    • http://zunaxixe.rf.gd/basketball_players_wallpaper.pdfIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_fca9731170674388af0ef58c3194b52b.pdf?index=trueIn 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_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 5340 bytes
SHA-256: ddbb00cb92177ca7340f6c1305118dd63f504507ec7d21bb69ca5e23387e75de
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 10516 bytes
SHA-256: 6c5dcf571f276262c5b1758da02804b06c023f615398605b8b23aa3512ea61ca

Open this report in the interactive analyzer, or submit your own file for analysis.