Malicious PDF — malware analysis report

Static analysis result for SHA-256 86afd201dca5194f…

MALICIOUS

PDF

84.4 KB Created: 2021-09-23 09:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d85e86df9b2d5d809f28a354304cb3d2 SHA-1: da1e900e69db3645bad98b49d63b49f7e5588cb3 SHA-256: 86afd201dca5194f4e83d4de47c5c8f02667fdc58b68f2372cd65de7827b1bc0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised WordPress sites, and one specifically uses the UTM term 'bank statement pdf password remover online'. This strongly suggests a phishing lure designed to trick users into clicking malicious links. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://oniceh.ru/uplcv?utm_term=bank+statement+pdf+password+remover+online PDF link annotation
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147acf47e2a1---57632101158.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/lajomudutinigifaroburij.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/31853090024.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614bef77bc417---62462489901.pdfIn PDF document text
    • https://anjingliar.com/contents/files/xidubebatanujujat.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/tukogovalaserafibi.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/55312967494.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/jemokabegavonivumabom.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/piremapufexilo.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/puwako.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/85012905051.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/nomovafivatewavikizanazur.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a6f54c833---38127442923.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/70475278330.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/dusil.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/sofakanex.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316889cec9b---64983997362.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/27230978914.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/fobodukuvo.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a75da06ea4---xadebefalaz.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138385de9697---vuvova.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/munurotikapep.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161478b99506f4---modumedawelavu.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/sumefobo.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/37314944779.pdfIn PDF document text
    • https://zzwgjx.com/d/files/37570547869.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/55830712429.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_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 10956 bytes
SHA-256: ebf8c48bb94b0d0687c5f76a61519b036ab5e6eb3dc6a710104f8e3407405bae
font_01_sfnt_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 17920 bytes
SHA-256: 9d0e9d6b220753a9b97dce8b808e42bd05fc7991d6e70cf8e740424a14d9bde9
font_02_sfnt_off00012b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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