Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32e5824ec455243…

MALICIOUS

PDF

85.8 KB Created: 2021-06-25 20:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 121745635a3c16474b2ed52d9304ba15 SHA-1: cdcc8fb10e01c9a4921e6e5451618f3270b001c8 SHA-256: d32e5824ec455243917ae4048ae078ff232f07cf0ad4287a9510c350903861a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160993b8704cc5---mubeba.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/oud3aj7tjuu2id36m52j4b8dui/davuwinedorixumemaro.pdf
    • https://x-software.cz/data/file/zunalegunedamoxalusovuw.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806dcc84674---69528240643.pdf
    • http://tksvolga.ru/userfiles/file/lebetumepebuwowafaka.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/074c59375b7555c7d7181904b008fa1d/11707690248.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5ntk7ptn3alfk7kna1u8947dao/vesorumonorukagegixozo.pdf
    • http://amctop.com/board_data/editor_img/file/202106192058.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/iqachbaf678om2h9l4irrmggin/70711998727.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/edpln9pvhkhl9jteft6rjf932o/19377495980.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160abb4af4fc94---70344699176.pdf
    • https://aimhc.com/userfiles/file/14127849314.pdf
    • http://hosungtour.net/FileData/ckfinder/files/20210621_6B31C429B54CD9F3.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/cdc847ccf13cebfcdf8fc0dbb94192fc/nukajifob.pdf
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/67010265602.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b01d8c6977---vadelukise.pdf
    • https://jajugroup.com/ckfinder/userfiles/files/palowopegekezoxanajope.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b092122ee52---pexubedojolozepefapamapap.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607dca43120d9---gakeb.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e9433a006---70546844872.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3e2e6174eb62f1d95eeb3095c96df5f7/xiruwurow.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/015450ad67d4d6ff1d39756fd2caff98/wofekinofuxevativinu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031ef1db29---62284730661.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=all+electronics+components+details+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_off0000ec1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 16792 bytes
font_01_sfnt_off0001042f.bin
c9880d77eb047e8ef04a06e5d7608702500e0ac2e99d68b77f4eb052e99ff7fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 17272 bytes
font_02_sfnt_off00013140.bin
1adc203100bc62b6cf8b907e2550c7229f84212c7955ded132f213f9b44d7461
pdf-font-stream PDF embedded font (sfnt) at offset 0x13140 10760 bytes