Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8b80d8884ff649…

MALICIOUS

PDF

91.1 KB Created: 2021-08-13 17:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7cc345624255805845f337d431259017 SHA-1: 132d0138b8585ab8f59fed043dfad95a442169dd SHA-256: 9d8b80d8884ff649990835cac76edf391e80e3c1f6977270fb29c31249cb2315
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The document body is heavily obfuscated, but the presence of embedded URLs and the link farm heuristic indicate an attempt to redirect users to potentially malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160afe46ac7a38---dupexosenetewevufakofin.pdf In PDF document text
    • http://przedszkolenisko.pl/userfiles/file/tijezomisiwusev.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607373080fd0a---wejovapalileve.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a500da34450---73221778578.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/wetoxo.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/losekibafasasejaloz.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/sivariwewujopuxetiwuziso.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/53443071874.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ja2g4flpmoomabn8k4t2recs71/gativejatuzowobitixevepog.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/fefulukejovuwo.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/1d67f8edd71ab98139aac553f483b43a/21327530905.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/setoxubekil.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/104712d44509aafcfdc1af6f98cc1eb5/76602618568.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85301b2f4---jilotixelegusiwi.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b73838b3c4b---49780119323.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/97287884759.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9446cb96dc033c1f2f28ec527c1c07df/fuvedigibutezo.pdfIn PDF document text
    • https://castel.ro/userfiles/file/xosuzukemomu.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5442c91414---99143463810.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/itfk2t09714an4fh2ncspacee3/32342809061.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c42fdf0e4---dizonijigux.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcbb31451e---12386127102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=cheat+codes+for+mx+vs+atv+untamed+xbox+360+unlock+everythingPDF 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_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 12028 bytes
SHA-256: c14fb7ec94fd9745ebecc4df7f68a1f1b764a5459ced42515276e1c0ed7557fb
font_01_sfnt_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8E 18440 bytes
SHA-256: 5413ca55b59b327b8e57f5568cdbe0f48c3612dc5e61d135b7a23a88a523d4f1

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