Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0ed9f82fcc35a1…

MALICIOUS

PDF

84.2 KB Created: 2021-06-25 15:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dadac7dfc570d2ebb45d646f19ad70b5 SHA-1: 618206cbf4684e8bc43c1b0d3f72aae9aa89b8c7 SHA-256: 7e0ed9f82fcc35a1b050ab0ea1a4e3a582043be28e97820439ae28aab35561a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, including WordPress installations. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=gta+5+installer+apk+download+for+android
    • https://stiff.pl/ckfinder/userfiles/files/95611581035.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/0b35661ec6f0b792741ebfa2c32322e7/firomogov.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/rm1u3fkete3os3bka7bvb5fiaa/96159758703.pdf
    • http://chi-kara.net/userfiles/file/vepejo.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/65d2e39f9d842a56e3581762c1a705e4/15230238751.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/0j0o7b84qolhnruo9hnbvfste2/tifalavifuzosulemawed.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/dc51bac63e8802d481f525484146ab8d/tigosatanezoduzokajebatux.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/eb915eeeb09ad6544649fea8fe1a8956/90472879439.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/4e17c648cb16b9ff556d37fcc88063af/61281268271.pdf
    • http://opakowania-loga.pl/zdjecia/fotki/file/32287649449.pdf
    • http://igigeothermal.jp/userfiles/file/kunuxov.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1b331181---kafuxujozu.pdf
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/106c3b4575a7a4f3621ca62b25d2045e/43524757340.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ddaf3b977---wobisu.pdf
    • http://crediramasrl.it/public/file/69172850355.pdf
    • http://aquatrustfina.com/userfiles/file/37025459025.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e555.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE555 16792 bytes
font_01_sfnt_off0000fd67.bin
e1c3976251d58ca23ed67770c904da6c6de88889c12e42f22b1cf06653d30dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 17232 bytes
font_02_sfnt_off00012ab3.bin
c23783df4103f61ded95416826bbf5d46cb02808e132ba0f1564f82f1fbde141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB3 10844 bytes

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