Malicious PDF — malware analysis report

Static analysis result for SHA-256 4800f83627b1c882…

MALICIOUS

PDF

86.4 KB Created: 2021-03-26 10:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9ceea863208b11070153af1a1fcf428a SHA-1: 464b8c3f3f5f7ae66a93197d25d30282a6d9e2db SHA-256: 4800f83627b1c8824a59991d96832594ff2a45180e82769eef5a4975c546d680
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('seumenha.ru') that is likely used to host malicious content or redirect to phishing pages. The PDF's structure and the presence of many links suggest it's part of a link farm designed to distribute malware or facilitate phishing attacks.

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://seumenha.ru/award?keyword=sheet+metal+forming+process+pdf PDF link annotation
    • https://raxelapanaf.weebly.com/uploads/1/3/4/7/134746791/gizevuvejozemam-dawajelono.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/causes_of_narcissistic_personality_disorder.pdfIn PDF document text
    • http://jolovomolosubi.getenjoyment.net/79102692801.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/40440755214.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/arquitectura_bioclimatica_beatriz_garzon.pdfIn PDF document text
    • http://majovevalaji.sportsontheweb.net/go_go_scooter_battery_box_removal.pdfIn PDF document text
    • https://kanelepamub.weebly.com/uploads/1/3/4/1/134132184/dojaxalajemaso_tusinina_lasozazixeropu_kijibo.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/c5c5497e.pdfIn PDF document text
    • http://xazapefunel.getenjoyment.net/4740204571.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/89716963210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_1db6565b5f7e4dc8afc6f07763fca2c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tevigotu/formica_calacatta_marble_countertop.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/electronic_configuration_of_noble_gases.pdfIn PDF document text
    • http://xasagode.myartsonline.com/dugiwefeweg.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/67544597324.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/55549576267.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_9579966c01344564915f308ff09ab7d1.pdf?index=trueIn PDF document text
    • http://defakulid.atwebpages.com/java_programming_2020.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_dfe16aa3ee364b63a5e0850007946cc0.pdf?index=trueIn PDF document text
    • http://lesidiwajenowil.myartsonline.com/braun_series_9_cleaning_station_worth_it.pdfIn PDF document text
    • https://6558ac43-984d-4e3a-97a1-dec8860611ed.filesusr.com/ugd/c73740_06b3fae55f3246ed914f1bf5d1e88076.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_off000115bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BC 5672 bytes
SHA-256: dd03a4310df65bd322a4b14855902251ddb88f54d2c17e37311f9f5e0b0a52c2
font_01_sfnt_off000128d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D6 10372 bytes
SHA-256: 2401fb457aa0a87fb9d110721f4203bfcdc22acb4891b29c0c1769d515535591

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