Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adabca8251fae2c…

MALICIOUS

PDF

69.6 KB Created: 2021-09-15 23:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b0be04522e7be6da2de6c3925f551c0b SHA-1: d376171d564740c9bd1606cb00d2bb2262d75f61 SHA-256: 7adabca8251fae2c16bdfc7e88af6ce1e02ac9ae693e0e10b1083e6f1dfbb953
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to unknown domains, and one heuristic specifically identifies it as a link farm on disposable hosting. While no scripts were extracted, the presence of many external links suggests the document's primary purpose is to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yeditepegumruk.com/userfiles/59881897973.pdf In PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/zelitizepazewobibose.pdfIn PDF document text
    • http://sartor.ru/upload/files/gabawumasi.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/889003741.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/gedodifakapo.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/42173618606.pdfIn PDF document text
    • http://flexa.cz/docs/file/fonovewaxogi.pdfIn PDF document text
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/xarona.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/fegudonawixovupugodapapaw.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/kozekividisij.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/gavula.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/bisulejinazil.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a83a08a29---66470438296.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/31782565980.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/rapepovurezivev.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/vojudedobidirinase.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/69608311080.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/fazifafajirumod.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/nigorigejariwevofadoduzij.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cf6426a938e82023558861cf415b7cff/48090509724.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/maletutofuwovogulojalutaf.pdfIn PDF document text
    • http://kes.org/upload/editor/files/zaxurewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=can+you+get+plants+vs+zombies+2+on+pcPDF 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_off0000aef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF2 15516 bytes
SHA-256: f683926481405fddac244ec7ee2211d85b5a097068d4d385c3089ebd7328a339
font_01_sfnt_off0000d6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 11248 bytes
SHA-256: b77ca21548c7d8a284082c9b0d33cd69a7851331bd880001e1b9fb0e125540e8