Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0906f794d1b8867…

MALICIOUS

PDF

95.9 KB Created: 2021-07-08 10:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 47e56d104ed909b059b75d124f1e4953 SHA-1: 3fc971970df448d31d77f5d12fe51bafc4915341 SHA-256: f0906f794d1b88675640de008709c3add51de1b49ab26764326aeff37466286a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit kits. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://pistant.ru/uplcv?utm_term=sex+positive+asexual+definition PDF link annotation
    • http://levne-pohary.cz/UserFiles/File/52441103778.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/af71764f8bd9adf1c0eed6898e4b00bb/sovakot.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/96700952418.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/38600137696.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/wowivezagoxufuga.pdfIn PDF document text
    • http://zuche0551.com/upload/file/81718886067.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160747f7bb4e7d---dedelanal.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a5cc9ce07---70902766054.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/d2p36l89cq0b50am62fk0o8bor/46485674919.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c617f2817d1---78815182972.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607b92e679b0e---kazuwezojaxapa.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/rigepowixozafi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/01c19c89a40dcf65304ed56815ea0fb8/27795249415.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/fvjap2co0nl06nfi1880hef7p2/63641909248.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/13284362716.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ktlepbf1kpl8dlrtt2gh0on2sj/zexexonupixojudanemosepix.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/tl8m58a7mgvcj8a70vghlfptb4/3029656824.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7k0gf91ub3u3p3l313nukvvhn0/tekafalijamesa.pdfIn PDF document text
    • http://belst.by/upload/file/vumizizoladutage.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/5betgh1opis2srcjhmit92nqvv/89048747790.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b173a6ce8ce---wevozinar.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/neregifozi.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/50550148759.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/31088051247.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 17280 bytes
SHA-256: 399db49a6349b9a08278c598a47d199e5b7245fbdde6537d1417c1dff1756eb7
font_01_sfnt_off00012a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A86 16288 bytes
SHA-256: 7c93e5221d766c39152cd7abac4c148a15b28f78015f3f131597034060f1c414
font_02_sfnt_off00014089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14089 10732 bytes
SHA-256: 0d6958709479aaa03b8102289bc7b2d0c3f319ff5eb50ee5ba35a3fe11df3514
font_03_sfnt_off0001595e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1595E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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