Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6e74a4625d8ac8…

MALICIOUS

PDF

98.9 KB Created: 2021-09-04 19:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c8e3debb047eebd0f2498b1b3b6ffec7 SHA-1: 52bdb176f3c65e61f8705063e881fb6165b4ccb1 SHA-256: 8e6e74a4625d8ac85bf2dc66c83423859d77d192cd01401c4889a7fbff0a801c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://svsteinfurth.de/radsportfiles/file/tovoranemosivuka.pdf In PDF document text
    • https://asset-books.com/userfiles/file/52914495402.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/45688859632.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/81db47c6bd50664cc0ab5ded0c7f27a6/lujaregirozop.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16081f426620ed---20455438942.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/xanasawusedizodaduwafej.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/26469704060.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/wuleme.pdfIn PDF document text
    • https://parfumzone.ro/files/file/98911883711.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/50432407244.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b8451f981---44260704405.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb5fb4d2aa---30809991767.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098c311bd4d0---vijurarajen.pdfIn PDF document text
    • https://mvservice.it/file/koxawaz.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/62783213859.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a0cbbffa---70548110598.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16072d06d2d3d9---93014426974.pdfIn PDF document text
    • http://cudicio.it/images/file/pizirigimekulaxudedonel.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/44789835207.pdfIn PDF document text
    • http://jar-ted.pl/file/rulugugabowogonadekiwo.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bfd4e9d27---wilokafajomabo.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/gisepat.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/72021135711.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/fuxirexikivunufuzodu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=literary+movements+in+british+literature+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_off00011570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11570 11140 bytes
SHA-256: ab5d5adaf94cf8c527b0e8bfd522f1b082f2959b939ac8e195729a9738c1edec
font_01_sfnt_off00012f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0A 21372 bytes
SHA-256: b5187b69f68600b8d549124ce2cb8bb7b53722fd61f10d2ae6493bafe4774a24
font_02_sfnt_off00016578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16578 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1