Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68afc5f3c31f769…

MALICIOUS

PDF

88.9 KB Created: 2021-09-05 11:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 32daf9f2e64785912cd73c17f77d6169 SHA-1: 039cbb0614b406a82f93bc79b70618e89a168d07 SHA-256: b68afc5f3c31f769d50dc2a4478050fe370f68bf6995bfc25be5f20909b8745c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The embedded URLs suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://infrive.ru/uplcv?utm_term=zoloft+50mg+bula+pdf PDF link annotation
    • http://gopherandsquirrelcontrol.com/admin/images/file/17486489547.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbe4707ebc---78917268038.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607acdea70f5e---59928306516.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de91257d25---fexobitiluxetomeg.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jisigoziton.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760f576e7b3---belevafakimubosakokogab.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b114386b801---14366009968.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607665c156932---wufonirode.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611ff4007dc3a---pagafilesijufaki.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder//userfiles/files/59722294084.pdfIn PDF document text
    • http://come2menorca.com/images/file/liwepojebebetox.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704e1584b43---60319734402.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/76601637670.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/jfer6hp1t2fbqhh5hpsjbt8a21/nifukirajerajatutu.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/buvigarajogurowotokewi.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/84514376449.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/53736477584.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/95838689867.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160729fffeeb38---43071981784.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/zizekufiwimagutenuturazi.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/00482ef8b5cc016969ec7fdbd93319da/75847475139.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/fodupume.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/rebedapibamejunusedu.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/xexanepebomu.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/36961b7211f93a11a5d3e2a6273caa36/17355420576.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/li74u6d851aj3up85kldlq79f4/vimizev.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a9f570dc3---32808281061.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_off0000f734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4B 10704 bytes
SHA-256: f1ee46e8db9d2c3d2f305853a977d2b004e5b4d59850864fd0d3bfd49e345164
font_02_sfnt_off00012783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12783 17708 bytes
SHA-256: 91ba59ac3b33007954ca082d89b80bf5c6f7ddfca4825192cc9c483fb792e78f

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