Malicious PDF — malware analysis report

Static analysis result for SHA-256 160322c8d91a581e…

MALICIOUS

PDF

64.0 KB Created: 2021-09-16 01:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 387638dc01a34da0d77145909bf88b4e SHA-1: 4fa2279ee342353855bf94a63010a8d27f70bfb1 SHA-256: 160322c8d91a581e2a587aba9a7f3c12912f1e9aa7fcbd268649486d4a06f4ae
154 Risk Score

Malware Insights

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

The PDF document was identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links are likely intended to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

Heuristics 5

  • 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
  • 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://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330c8e5267f---busatafidudiwez.pdf In PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/vefaxodamidujugudetuxajan.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/66813974079.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/rexirumugusevunenaroxez.pdfIn PDF document text
    • https://baongochoa.com/upload/file/61720893990.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdbd39a62a---kidema.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/78396950604.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/83269224156.pdfIn PDF document text
    • https://atiksigorta.com/files/niminovoboza.pdfIn PDF document text
    • https://mediaskills.rs/files/kolajotodawoxoti.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/sovemoje.pdfIn PDF document text
    • http://wernitznigg.at/files/bibixodubugara.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/gugirerumifaxivarazekeme.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16140b37fa1da3---gebimopelitodinevejajigus.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/nevogixib.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/82003917430.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/batufefulitozogunovofow.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/lebaje.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/1149028623.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/befomarewuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=avengers+infinity+war+2018+dual+audioPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF87 11376 bytes
SHA-256: 9cd3bfeb92e5aa125ad7b3c6eab0194f70587dc2f2c43abbac82329d4c106346

Open this report in the interactive analyzer, or submit your own file for analysis.