Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ea9288139ceda5…

MALICIOUS

PDF

84.2 KB Created: 2021-08-18 08:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ee27f5b9c85b9d66d33c8b8a13bac947 SHA-1: 3c9fc3ed1b98319ac9f7754411aec6dcb002b4e5 SHA-256: 02ea9288139ceda565b4662f81c891a5a2c70662b051e52b6ff65b34da94c174
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, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/4i4g0qsd6l67n65neajklke3gt/rirupez.pdf In PDF document text
    • http://windmill-bv.com/userfiles/files/wisumurujo.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/dd8cb556a2054a64b9184fca2cbdfad8/14247300572.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/porudisazewofipe.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972885db387---verixavepufonolenobus.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/655a22cb77f63dd62e1dac48120e7ccd/pofebirifizamidubogakig.pdfIn PDF document text
    • http://mfahk.com/upload/files/sirawurokagunerefiti.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/43419765719.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc52ed81ab1---ziwatuduzumodogab.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/73912458280.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/ccc95fda01aca1b4b67aa7502c2a322f/76716064866.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/71746754998.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/80294574717.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/o9jch7nptn5g2hguftdqpmp0j8/kasevibokogifesotoguvelen.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/20738207934.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/92731365522.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/43077037073.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/b0b84bd88810d2923f522955d85ca9ed/leranofuminuxanare.pdfIn PDF document text
    • http://stevis.cz/files/file/9090215909.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/resalezibumikozuk.pdfIn PDF document text
    • http://ehsclassof88.com/clients/7/7f/7f6c4973f16106f9a1f2948091db50b4/File/10450226608.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/wifimawagaxozedesamij.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/zixopoxikabulamana.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/86ea96b56d764453821358cb7f5cdba8/69141564952.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=apex+legends+cheats+free+ps4PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 16820 bytes
SHA-256: ebfea47f25bf5f50ff89c02bc7e1b46d1ad7dd928a29f41795daee4c0128dfd6
font_01_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A8 10848 bytes
SHA-256: dd70d9756ddde63135527211847e246e5eb6aeaa0fe945bfd661c5c8b4ff6164