Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fae16b687d50dd…

MALICIOUS

PDF

80.9 KB Created: 2021-08-27 20:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef8ac33ca7e5eb9b3c25196637234da2 SHA-1: 0eb49e68e1ab56e3baffdce7ba9f72518c18e9a1 SHA-256: 60fae16b687d50dd054fa9f9233b6b6b6593ba8ec6aa41c493b547acc02a4131
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external URIs and links to disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=when+do+you+capitalize+north+south+east+west PDF link annotation
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/80l25bbant4681ifk137bpe6c2/woxabikolitakufijogaxubo.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/wixuwuvevalejat.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/xebugude.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/f6aab35f698629175a1cc0bd0ba627db/sanezokexudijudalexaxuva.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952da9ab23b---6013338040.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/monotiririwixagi.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/19344118938.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/51114015870.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed9cce7e85719d0335ea96733dc1e07e/37492347438.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8df22e96b2---kadagidelufunafo.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/23cd5c7f6e051410ba9f1c8c9ff55aea/nigejifaxebon.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/26029017251.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16124b684d27af---25830387938.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa3caeab1f---wafozamib.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/28518637873.pdfIn PDF document text
    • http://apsons.eu/files/file/62233902876.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/013a2192d0a11d421a9e745d79532c82/39318853049.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/82c477c88826c1f22fa91a08a56edd0d/60012496767.pdfIn PDF document text
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/55015392435.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/78477367665.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/62684949539.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f58f7021526---22818347358.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/lovato.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_off0000d6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D3 10964 bytes
SHA-256: 0723c4e404c3852bd1a963247fb88c3302a50e4a04df6aece93a714e66377bf4
font_01_sfnt_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 17752 bytes
SHA-256: 03063c5cd9567dbc44d534f9e482295ea399668f5b2fb9f6ebbc1f3fa1fef8b6
font_02_sfnt_off00011d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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