Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8d73fc7f126f60…

MALICIOUS

PDF

82.4 KB Created: 2021-06-29 04:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 79c57970cd91c486ca93ee968819ac94 SHA-1: 1dcfd97dc338c12501bccbfe7ddf87750f2540e7 SHA-256: 0a8d73fc7f126f60b7e0f3169a7ef4b502e1b967271614ef25a4840dcab0a984
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://garglob.ru/uplcv?utm_term=what+is+the+difference+between+polar+and+nonpolar+covalent+bonds PDF link annotation
    • https://ajitcoatings.com/uploads/kofabezavumibejis.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/77064427286.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082551cabbd5---76623269326.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0bef3c9af82c1d688ecbd174bb9381fc/videzezesowowebavu.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/a5f8d24e5dd4db8b653c21da0aca572c/31905948112.pdfIn PDF document text
    • http://siembra.me/uploads/files/23343849682.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/61868788484.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/88637194352.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16096be73b37b4---jawifesutunuso.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/dkkimtbn2nt03ieb4na2qq9u44/62741042090.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-27/images/files/87168276467.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/68239783784.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc0a3d9af5---24945414954.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/tm8n8r0eui4ca4tp6r7vp7e2vm/xabulitunupo.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160858c3631228---65748631699.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/051b6784b0a81ff68662a71d64a6d912/9395432600.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/xabilefezixusekoxerejaf.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d3f7372fd---46408530364.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/potuxuzasegoj.pdfIn PDF document text
    • https://cristalensi.com/public/File/15385937253.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/79905505543.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/a9514bf3c20d2a0e74f9ad6fd3b63dfd/fafowobadada.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_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 11004 bytes
SHA-256: eda0f906cc69bc13fc391b19b45c8e687bbd36818f42be4cd369a0b0b3dc8336
font_01_sfnt_off0000f826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11038 16736 bytes
SHA-256: 1fa1799582791b2dcbb84d86415ba5e0abb5855d1676953264fd8a93317c5d90

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