Malicious PDF — malware analysis report

Static analysis result for SHA-256 be89e7052d063285…

MALICIOUS

PDF

68.5 KB Created: 2021-09-30 23:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 716bf69c4fadb48a348e23706ecd3608 SHA-1: 56622d39883a53ebb1a66d18887bb8d07dcbdc3a SHA-256: be89e7052d0632856baa3656e235406018885a28edec55d5f2bbf25673a149ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wastran.ru/uplcv?utm_term=passare+da+android+a+ios+conviene PDF link annotation
    • https://databaze-zdarma.cz/userfiles/files/wijutib.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109040425352972.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/poxuve.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/nutifezoboxubelumigirotik.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/2769a5bf46ddc384d91c5c8acf6b0f51/49901850238.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/666996427.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/30728137014.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/37541251876.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/pavaxijosop.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/nojavuviwirofokatotejemoz.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/rajadebesoxejafi.pdfIn PDF document text
    • http://ud2-140.com/files/49875792416.pdfIn PDF document text
    • http://sakem.org/userfiles/files/sulejif.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130bfa8c7ad1---lobakolujor.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/xovupasokefewixume.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/negebixapam.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/sirudadonejefo.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/funugoladodiw.pdfIn PDF document text
    • http://fencefactoryny.com/userfiles/file/tonivufofemorow.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/73879022842.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/zafewugegozebitim.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/47489144675.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/vogegubokibiro.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219271625413867.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE13 10284 bytes
SHA-256: b74de3ce3b851bdefebc5fc891ae7f5b245f800ca8b0a2cda84df8fee38adf77
font_01_sfnt_off0000c555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC555 15352 bytes
SHA-256: c1cbbf4ea2464ca75a4877f9f3d4ef03714169c90f6e63b8886ea2d834796d36
font_02_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1