Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a2f473e99c5ab2…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 14:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: deca21a96960a3b3afcdfdd062d6175f SHA-1: 68ba1b7e83b051c62bac0431bbadf9bb563f45ca SHA-256: 32a2f473e99c5ab2315a0d15ef6e644deb4cc903bc5bbeb642da002b24447fab
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These URLs are likely used for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://philabc.ru/uplcv?utm_term=peers+program+manual
    • https://www.alapan.org/fckimages/file/26246970751.pdf
    • http://azseal.net/uploads/userfiles/file/migowo.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4e0225c5---5408318738.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/3c39af661769cafb9efa667ae7263bf0/bukozepixet.pdf
    • https://samowar.me/userfiles/files/zukixewoderozexavanuxavin.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0ac6e7dbfcecccba854e961560b9eb1/37802682541.pdf
    • https://systematix.pl/userfiles/file/3325738731.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160edf3cb85811---54835340709.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f87d7ca4e9---xavage.pdf
    • https://ideylia.fr/uploads/file/vegigij.pdf
    • http://universalgroupautos.com/files/others/90417817232.pdf
    • http://signauction.net/userfiles/file/38571649213.pdf
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tilomadufirevewa.pdf
    • https://skyzoan.com/cake/beta/userfiles/file/18249088271.pdf
    • https://fainitelecommunication.com/public/editorfiles/file/20083510562.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/h1tvl6k2b05qpcetaf9ca3vh23/3292336061.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/bebc8a11cda8cd96b139b7a6704ac926/27226336648.pdf
    • https://businessservicesuk.com/userfiles/file/22075679111.pdf
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/44020861951.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608882ec1d328---ripimuka.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612b698e954d9---24630257334.pdf
    • http://machulski.com/public/file/fidupevajewudad.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079b45584585---95794083517.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_off0000d7bb.bin
eb11475a07d19b60e134ebca2ba1718699d233bb5dff65061e45adb383e19b44
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 17404 bytes
font_01_sfnt_off000104d9.bin
ca38d6217147258a9aad412224fb3d732c49602c2d55c248cf100b0230b7c57d
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 10508 bytes
font_02_sfnt_off00011cc2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC2 16792 bytes