Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fda2227973436db…

MALICIOUS

PDF

93.7 KB Created: 2021-06-12 17:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 259596aa024e51fa1a240095e22dede7 SHA-1: 84f8a8b30a8cbe3c6854be1db21697977cab8885 SHA-256: 8fda2227973436db6023ca7a0df828e2c6f495a97d3f0bb02b5d9451eb85d66a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://huntic.ru/uplcv?utm_term=vegetable+biryani+recipe+in+malayalam+pdf PDF link annotation
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa7ba49c25---memefabuvipujokenad.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eef2265c7---13691699921.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16088084947c1a---sodib.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2983e4426---22322829982.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/64771695467.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/68663349274.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609487985bb4f---gumofafi.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/udpcjqeu1lrlfejhp174maqgsq/koxetiniwi.pdfIn PDF document text
    • http://championsview.net/userimages/batimorolat.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/gokudikatufowutozus.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607428e2a5df6---revukuzojinebut.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/10491758755.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73439022198.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/30903349966.pdfIn PDF document text
    • http://azizolace.cz/images/file/numupetijokajafakuwon.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/47087445547.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb636601a7---85392045411.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10589 5504 bytes
SHA-256: 4ed773d7cd8f05288aee0c34ef7ca49ffed83def17f029d0c572ccc083c524a2
font_01_sfnt_off00011832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11832 5988 bytes
SHA-256: dc5c08d68ab575a1071cde1d1217ed18b547177ea689f91b0da314c776296e2f
font_02_sfnt_off00012d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2E 10584 bytes
SHA-256: 4c78ff463e942579da40e79352ca31862cdc9730225a00b4270f89c378b6c016
font_03_sfnt_off00015175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15175 6748 bytes
SHA-256: 50fbf5d6c34cead5f1fb2f5130c6ecc32c2063152bb94aecc4f16dfa9993cec4