Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c1ee652f273209…

MALICIOUS

PDF

77.9 KB Created: 2021-09-06 12:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc7fee2c2629f3aaeb373c5350913a2a SHA-1: 29eb20588113568905c1149319a6a0c387e4583c SHA-256: 95c1ee652f2732091cf4ddcc35886f5aacf8c10d24d97f9684e7c45db55d7d5c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • 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 http://eastwoodfamily.net/userimages/1938744665.pdf In PDF document text
    • https://allcreaturesinc.com/files/files/nolikedakuwikagowop.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb40c7f647---xinutisus.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/37764029960.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608042e2dc7c5---zakakawamab.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/zokotarasegofozovoserupix.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/49332755460.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/widekobajagawi.pdfIn PDF document text
    • http://jinxinghotel.com/uploads/files/siremogozebimib.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/680402e89ff4ebd1b590428fe7a0f82e/25180298271.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/8597131821.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/88064645644.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/zaxegu.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/38941839310.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160708d6860705---gagum.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/rixomulawim.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/68623440681.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f00933209cf2bd90aa761cbef2905e67/34091040770.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/suxofaj.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duxomelibezotevi.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66e6f6159c---94190818601.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/neragabegireguxabena.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/vosona.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a341d96d7d3---38190075326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sindrome+de+turner+pdf+geneticaPDF 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_off0000c908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC908 10924 bytes
SHA-256: ae7b1db75583b205dd1327c7678cfe3108cf5205a06bbca32d886a9018ed7330
font_01_sfnt_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 18096 bytes
SHA-256: e0377153129b780875b714f6db0481157518ac8f6672cd7f3309280b23cb307c
font_02_sfnt_off00011199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11199 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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