Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba691acb6749518…

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 17:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 043a33334af8f006e85ee47bac1cda08 SHA-1: 962493794425db4ec9ab1d52004674c1b592aa5a SHA-256: 2ba691acb6749518b4b232ec50b3029f0adec6191af1bf0c9512c764e3a97709
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, likely to redirect users to malicious content. The presence of multiple PDF link farm heuristics strongly suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a39708ba50f---33718932193.pdf In PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/jba05r64tcd847l6a8t7narsb9/xasaki.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/20235430310.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f0fe4df655---sepefazagonobisix.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/somamagojosetoso.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/36042343374.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608002b9f1770---59116219045.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/volaputuz.pdfIn PDF document text
    • http://darec.sk/files/files/47289947849.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/30131852006.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/6sesaagefjeek4d66ur133sken/94780747858.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/c3b098372a766b6adf198dafececd7bf/bofefunixujitej.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/48472781405.pdfIn PDF document text
    • http://didula.com/img/file/budoraleso.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210512010135.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b13e5e128---gogegorijepowi.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/37978075294.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/6e478dd63178bdb27e2099ad88421cd9/27060723341.pdfIn PDF document text
    • http://tianfonmm.com/d/files/47419954305.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075dc7f8e83b---17014501533.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=glandula+pineal+histologia+pdfPDF 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_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 17284 bytes
SHA-256: 2bda0261854a416c480d1422c106ad523663f9b91c855d51b1146abff6012d85
font_01_sfnt_off00010e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 10816 bytes
SHA-256: 4a8859e0871a65d9d6443bb01713e1cf3ded98b2b5e038f45024a63ad73685ca
font_02_sfnt_off000126d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1