Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dce6e9af391efef…

MALICIOUS

PDF

90.8 KB Created: 2021-06-28 10:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e97e6219f173c9fed9055af43ae4282b SHA-1: c3d32039ba52e6ed415b7f835c8628270f4c8f4c SHA-256: 9dce6e9af391efef791ba14f20d8c009292157306e2220c358eb2a19561d9416
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://doktor-okonski.pl/uploadimg/file/37164977662.pdf
    • http://aaz.sk/editor_uploads/files/74248635520.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607c42abe8975---nenamegasu.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f7f69b8a9---mivikotifusopawiz.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc8a29f3f0---77423913408.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/e40521cd0fd4d2e44462406c02bb286a/47008048403.pdf
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/4688675676.pdf
    • http://doks-films.com/pcms/content/file/69683805295.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/c69fd761b0141fb38d835db8119d3e2b/punikug.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c43ed945c---30415413199.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d749d90c03---kogijilufawizuloporalex.pdf
    • https://castilloexterior.net/ckfinder/userfiles/files/kukele.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9ce2cf5b---32591298512.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607254ddb19df---niwobe.pdf
    • http://sbnjl.com/userfiles/files/xatodunikosix.pdf
    • https://pjkconstruction.ca/images/file/gopixivovirulugu.pdf
    • https://t2sc.me/userfiles/lafefegafebifusokami.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/78f0i1kei6th13o902uj59jbr2/fikajitegige.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/04fa3f08f207d9c5f226ce2c35aaef09/vorifunaluxujibotof.pdf
    • https://burgaseguros.com/userfiles/file/7412480512.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c2365238d93---62195546227.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a269f533525---xifovijosob.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609090f0bf029---xogosafevarobekipuje.pdf
    • http://asiadomainstore.com/userfiles/file/bajexoxemovitogeso.pdf
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97755278093.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=find+the+angle+between+the+vectors
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22c.bin
30b55d07c0f81edfce3ec9e6e2cb330d6786fdce4c6cfecced10834f97b0be10
pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 10916 bytes
font_01_sfnt_off00010b2c.bin
73dcf15debba37623110b736c2c1c82435494cdd9bdb313465d35f0b07cb8cbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2C 18604 bytes
font_02_sfnt_off00013c67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C67 16792 bytes
font_03_sfnt_off00015444.bin
3f2eb68e56e0cc9b24f861ad510cb196f24dbc520975aefba06cb0b93c7ac786
pdf-font-stream PDF embedded font (sfnt) at offset 0x15444 1284 bytes