Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b60eff861d8601f…

MALICIOUS

PDF

85.8 KB Created: 2021-06-28 13:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2cf9d87a8eea1e5759a2d22efbc1479c SHA-1: 24a935c1ea3b9263c02b1bfacc2f75672261cdda SHA-256: 9b60eff861d8601fec34227e1ba9b7087b15ccb1a315bf4cc5623b91e45ac6b3
156 Risk Score

Malware Insights

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

This PDF file was detected 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 various websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://lawrence-spruill.com/clients/42275/File/zukowurotozafesos.pdf In PDF document text
    • http://jp-cable.com/d/files/gakebeliso.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/99503017709.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/32341407240.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ea97df5b5f2b141573b36a569d006313/vuvijagaxabokatij.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b07b3cdff711bcd75200ec87058ceb5e/6501172478.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/xagiralejimijufelisoti.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/7ca6d413d28adcf41511ea729c6c1789/berejikobonol.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/ropofepadepazelumu.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f39f57c86c---xejinotarupezedibozipaz.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/2ac3502ee4b1fca992b2dc74efd2d152/pemipa.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/v4j2gnmfv8cd8la053hpr6ca0i/najukezovovegiru.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a80ec612501---59410238988.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a32547237c0---xanilegafenejotatufomex.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607668795c650---98383761206.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/0siivr7k2nko3lbutrvih6des4/68320757024.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/47809073052.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a2fbd3cdcf29cfdf80defe87a0a1411b/8745637186.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b377998a36---3042995809.pdfIn PDF document text
    • https://soechi.net/userfiles/file/merexirimifas.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/f5565ef105cef9998a142287a2e68d85/53726880869.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/5c2890b9a99415f2d2f6b78ad7608067/datametowododanovadeba.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/8cb1a618d99ea664f001de9716e22893/73289942850.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/2r3g1mfs9ssl2a1mm43i7q4it9/54075579128.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b135737d699---dikerer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=all+the+shells+in+link%27s+awakeningPDF 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_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 17576 bytes
SHA-256: e6447dad66450aadc16b693ef2915cfbf705a443309fd50b2141826b5720fbde
font_01_sfnt_off0001188c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 10360 bytes
SHA-256: 9a892fe6a9e5e7bd63df1c70fd22b4964f04bf7f4dbc53c75f343220019249ed
font_02_sfnt_off00013005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13005 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1