Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f4b82f9491386a…

MALICIOUS

PDF

62.3 KB Created: 2021-09-01 18:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0817c40b7e8fd909f51ed310c05f0220 SHA-1: a42f48e13574ac81b6a6e6ef3a5d94527322838d SHA-256: 89f4b82f9491386aeeea9c4f5e11cfa4687c6fe333fa2c34098bef3b261c0132
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious or phishing content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7773

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.
  • 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
  • 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://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/a7e98393d74ce4d48111e8f17aca78cb/98220668055.pdf In PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18698067972.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/726e20b3a974c65542f090f3f9e56a38/24174290597.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/sigudiw.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/57snqjkkev13jciv1n1r0531up/wazedo.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/66135115267.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/39407598837.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/f475a6fb42639022e0d50204632381d6/zumakes.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607561d9aeead---zinatej.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/noxojebamotewagemevoko.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/gegagerekibu.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160868d24d0695---66453082710.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/40451662928.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/gesuximagojit.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/mekolitu.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/wudanabinuzorulomut.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/kofekenezugigexepab.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e41b428d77bc95795c6abefdda947336/49127908514.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/lujokokinigoved.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/80683672028.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/lonujarukiwupog.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210703_B8358D1DF96F7EB3.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/62809745541.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/lubufunipexexivenaxini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=that%27s+the+onePDF 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_off0000ca49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA49 18404 bytes
SHA-256: 87ecef31e2601487c7a0287083efe40bd924d6b30e2c92797b48d06a1084fbb8

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