Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b95c00116fdf9c…

MALICIOUS

PDF

75.6 KB Created: 2021-07-21 10:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c1816faccd9b0053286ebdc4a36606d7 SHA-1: 032fbf0342694aac3ac6054ba131bd98bed6c02c SHA-256: 60b95c00116fdf9ce35d73122e54025545e0aa5c94444bd2111030d563ad169a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised websites, likely to host malicious payloads or phishing content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ahreco.com/uploads/news_file/68982773859.pdf In PDF document text
    • https://lasanisports.com/files/4598897272.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/24se1s4f7l69d9s0ps8ngr03j4/xajosakob.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/dunopimux.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/gozixoputekufokigulisip.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/63387f1612b86c59ed6af4e44fa99e02/merix.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be15fcde102---82324371352.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/valerobekamo.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c07aef454---76707879094.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/58e658d1ea3d6fd83e00c7e8a9a75a86/88760683479.pdfIn PDF document text
    • http://splogservice.ru/content/file/lirukudazebeleteg.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/xibowudepuvekuzabe.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077062a4ee9c---xedaxudiwelogozugam.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/8466093072.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d3894ee4e.pdfIn PDF document text
    • http://www.toptehnik.si/images/25256596275.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/5094139586.pdfIn PDF document text
    • https://starwebline.com/calisma2/files/uploads/16055008166.pdfIn PDF document text
    • http://i-dron.cz/data/file/79744117810.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/linedus.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/90bd8346c7016f074ca9a18840b03c75/davomonuxeruxepijew.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/19841472944.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/af53a4ff968bd36dd44cfc0a86a061f5/60316340698.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/fakawovematuwavuwexasit.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/81996175665.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/vuvolomakikomibok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=blue+vector+background+hdPDF 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_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 15656 bytes
SHA-256: f4e3b406b82368796154dd8d13c1530ef817585f254c4b11639329f858b4ea8a
font_02_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 10840 bytes
SHA-256: 2016a2dc113777cad6ac1a95e7ddd738f8ec91f42f7ea09790817f53f407f950