Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bc69718a3a7b1d…

MALICIOUS

PDF

86.0 KB Created: 2021-09-03 23:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b255f6f625ac13f253c460e8c2c2ac1f SHA-1: c02a66caf06728c89cd90b80d49afd6b6629d94c SHA-256: 97bc69718a3a7b1d616b574e1e33b55b0958e40d2563eca0c35d4c9667f8562b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous URLs pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious destinations. The presence of JavaScript and the nature of the URLs strongly suggest an attempt to exploit vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://oniceh.ru/uplcv?utm_term=nanda+nic+noc+pdf+2017 PDF link annotation
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16084942358044---nazulufiwiliweferefip.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/12701682595.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/56626795815.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/78896164381.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/84904240899.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/fokoxevik.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/150d81bd47d6beb870c8fb163b539ee9/39963056006.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/nowadugumigub.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/25820059863.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba33497a458---53706592872.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c2ebeeb43---61984911901.pdfIn PDF document text
    • http://bulmarconsult.com/files/wegisobigasazesovumunalu.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/bejutunokobuvidukikewom.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e46bdb420---57715272370.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/98317404902.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ttjp985ivoqa5m768nn8dg421d/torira.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/vifokerapitogo.pdfIn PDF document text
    • http://staropolski.net/Upload/file/wotalebekalililafokidu.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/s92a04a4vu7tic15ljbuvi4j2e/34184844096.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/41530027037.pdfIn PDF document text
    • https://pellevah.com/upload/files/vifatofuze.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/rabisuxuguzo.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/j5o4kemtbc9d06k8r3qtporsur/fejenokujo.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/maxarikotabe.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_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 10388 bytes
SHA-256: 87e63aa3037f91e65422ce68e6b4290356f432bb9733e458c18f079ae6bebf74
font_01_sfnt_off0001034f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034F 18284 bytes
SHA-256: ef8dc0d96de1dbf3e3eafee914641a99c1044355f3de725bd12adfebd26d08b0
font_02_sfnt_off0001324b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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