Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a847e09e7ae0bd…

MALICIOUS

PDF

87.1 KB Created: 2021-06-27 01:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee42e7d298f0fad9b577fb8d1bfe8325 SHA-1: 41db07e27302b67baa298aeb16077712bf1e0ff1 SHA-256: 40a847e09e7ae0bddd3308524d9a8e47c3b6ab6031e72023cdae57f0f5bf9323
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF itself is heavily obfuscated and appears to be a lure, likely intended to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/cjl4i7p7rjkm2lkudblaa6akh4/19660869996.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1433b0b3724929a8b96fa6bf93403809/jilak.pdf
    • http://mashtalkandil.com/userfiles/file/56569177492.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3dc063e901---vepositobapukedafozozewon.pdf
    • http://canphantich.net/Images_upload/files/zudijorixaragepemajolopi.pdf
    • http://ugrctrani.it/userfiles/files/70937708009.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2503774ce5---dudufawepetiparonab.pdf
    • http://allasclub.com/campannas/file/50717093269.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66fc71268---rozijuluwiwefetafi.pdf
    • https://mwasafat.com/uploads/files/pelowutixake.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9650d4a233---7498837769.pdf
    • http://bukharaatlanta.com/sites/default/files/file/92218153930.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7e19b886---99257729789.pdf
    • http://imaginove.eu/data/Files/3997898324.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/uvi30vm495biss73ju7anovamj/72529671727.pdf
    • http://hieuchuan.com/upload/files/70475778188.pdf
    • http://zonazero.es/userfiles/file/9780605381.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/425ade84858a838ca9914645cab8ffe4/20339724989.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/93fd4d3123e4b3decfb32570d5ba62da/76404953734.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/1g2cik7cak9187s2663l4du8bi/26003661565.pdf
    • https://usdcp.jp/user_data/userfiles/files/40626725342.pdf
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/waxazonuja.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/1d2553d4183167cc78a58d38998077be/gadotujawafonifimesore.pdf
    • http://gandolfiarchitetti.com/userfiles/files/vikadimikuba.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160775ed3e70b9---puretazetukisewux.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607882bcb65a9---ribigekawukogiviwogasitev.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=best+all+wheel+drive+lease+deals
    • 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_off0000f364.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 16792 bytes
font_01_sfnt_off00010b7b.bin
2ec4a0b05dfc24f9e292bf6dbea3ba7596ec0e1773cec5b20c768e77a3dc6a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 10328 bytes
font_02_sfnt_off000122f9.bin
f44ddaa6c5e3aa194e4e92395437f814b4a8b645a85ecac890b54299f7966e27
pdf-font-stream PDF embedded font (sfnt) at offset 0x122F9 16836 bytes