Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaab0e18aec3e5c…

MALICIOUS

PDF

90.7 KB Created: 2021-09-05 15:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 8a68a0d6768e2e5a2b6090024daeec8f SHA-1: 9f72a12a95a08da7881716a430218d419dd96dcd SHA-256: abaab0e18aec3e5c5d3daea71aeff21a9b597182eab21db999b83e1965243b39
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://eaas-journal.org/survey/userfiles/files/34957834598.pdf In PDF document text
    • http://asztalosweb.hu/userfiles/file/xamifuveraxuven.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/zetavawufo.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/55618028497.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086067db2c54---49439050577.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c87fc3bedc5---79883188695.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/zuzit.pdfIn PDF document text
    • https://stopserv.ru/files/file/96951802714.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a2205737---17826683166.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/82066257470.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ovnivrq44ju2p2omm305mf3une/36254557073.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/42976959422.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc703d007d---57526413426.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/9836f9d5c1364b998f7e4262e772c576/97193887028.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb0435ba7d1---13324365500.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/ec72ed2c7b52f60abb92512984605027/59161363018.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16072e63701528---lijitelopivik.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/42158395060.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/89457368466.pdfIn PDF document text
    • http://www.polni.si/Images/files/wagujoxogezozekibemu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c70c85df21---17840895582.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d418cda9c8---44084367133.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/felefakobuzafow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=layer+chicken+house+design+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_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 18136 bytes
SHA-256: 95e80c60a0795a2e12444075739aa85527181a479df3655b570f1f54b956a156
font_01_sfnt_off00012b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B95 11016 bytes
SHA-256: 7ef91096cbad9b9289c9805b96eea0fb2de829f0f0246033c1bb5bb8fe6d1b63
font_02_sfnt_off000144ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1