Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f5c5d1c333b8a6…

MALICIOUS

PDF

93.9 KB Created: 2021-09-17 11:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f2edaa41d2232d63ed89241cf5884979 SHA-1: 1b8309306d73ed6c04921e2e6a3bb4d342fea6ca SHA-256: c2f5c5d1c333b8a692031816f5d9a8e27c8903df53f9c43fc826b877407cd3dc
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS uploads, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites. The document body was unreadable, but the heuristics and URLs point to a phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=how+to+send+iphone+photos+to+android+without+losing+quality PDF link annotation
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/gojupajegumugixumurufawar.pdfIn PDF document text
    • http://agmapure.com/upload/files/xakupusivigaroseva.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/zufopinodapenezovu.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/75008998453.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/mebedigimij.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/92881203828.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/11556863649.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/81262369698.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/gadozin.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/8395497239.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/92233170509.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/zajijulegojudukuma.pdfIn PDF document text
    • http://tlw.ro/UserFiles/file/32954644573.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/jusofijipifodudoz.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/34737424871.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/27486280191.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e2cb54c75---25593965210.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/dufejamovebaru.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/ralomutevijipetimef.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3ddf0eed1---kukisutizosigujato.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/36386841081.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/sazisub.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/a06f3a9b46e7d1af56735bdba675c5bb/lejexonatovifavu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613be15f2c523---kakas.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/30754034696.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07A 18024 bytes
SHA-256: 2ae8d95e2f85dfcb271c8eca0e62e3608d05cf164eb5a989630eea31740fa50a
font_01_sfnt_off0000fcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001150a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150A 17244 bytes
SHA-256: 8034faa5ba3189a09cae25ab33eb511890f6b219b0779221da590181557000cb
font_03_sfnt_off000141d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D4 3272 bytes
SHA-256: 51a9156c15131cf7b39c260ec72555e45c736be0cd96c4ed29febf7931d52303
font_04_sfnt_off00014f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2D 11108 bytes
SHA-256: 15370ee22fe042d70a69f61f158b76348b50ed75a8f51a104d9d9fc2035bdaaa

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