Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadea09bf7f287c1…

MALICIOUS

PDF

93.7 KB Created: 2021-09-07 10:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2af137b466b47c8985476bec82b58999 SHA-1: 4ca3c604ddb688b689686776718003e1f830cd50 SHA-256: fadea09bf7f287c1fd01822bffb278ef1ac15df2edd5d908fde204a389323711
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories, likely intended to lure users into downloading further malicious content. The document body is heavily obfuscated and unreadable, suggesting it is not meant for direct user interaction but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/5bc3b7279031580ab70c1dfc42d4c95b/zuvawoxilorenifepudig.pdf In PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23298c2c6d---fofijebidojezilakoxax.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jirl4tb43slju5vg5329t4ean6/10165755578.pdfIn PDF document text
    • http://insk.ru/img/userfiles/file/12876783259.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606d239994747---91577122965.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/49839480832.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/aece38ae26248add3a9b5f12247cf07a/79588394707.pdfIn PDF document text
    • http://geose.ru/userfiles/file/foxetugogabojopoda.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/896895bd2c94e519920a6be3c00ac6dc/wakimiv.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/26323853790.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/pagazerudalurunimufuxivet.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070d53e85345---19310752670.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/c4753222ce7f310ffae4a99c2e775548/52309320360.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/4l3uh6dkvg06c594587cvghlhk/nuwawinemineladoko.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a972edfa9---23125720015.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/00afa95babaca76088a5097cc8ae9dbc/kegikawivusa.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/99936232928.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/domekutajinunuxofaf.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb952cd6e4c---vidibukaxifigo.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/guzujitivig.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a5de72527---74553450911.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=sewers+for+scotland+3+pdfPDF link annotation
    • 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_off00010a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A11 10852 bytes
SHA-256: 1bfe52aab26205033fa2bba88b08a25ab47c2b4930546869e797db09c7d2bb36
font_01_sfnt_off0001235e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B70 17632 bytes
SHA-256: c4786a1162bbfd24441a9936dba9e10956daf9e945411d7972560d850c221027

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