Malicious PDF — malware analysis report

Static analysis result for SHA-256 09290580d99ec967…

MALICIOUS

PDF

101.9 KB Created: 2021-07-01 23:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d18848601ce2c2bdbe6e652bd9acc376 SHA-1: d580519537e4c62858961a46aa49d4afd1b0c48b SHA-256: 09290580d99ec967157cdaccb5f4cd3b7bbbfde25fc80d6d69e0d00a3df34cbd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=minecraft+1.8+texture+pack+realistic PDF link annotation
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072baa0c45f0---sigabasodakisedovazalajus.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/8876d636a2cc7a6da3a5fdb846d7a1e1/23524183081.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d051c172---zoxulex.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/64189318184.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c860a4a0a17---sipifuvo.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/3159018890.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e2e2b44a0---50872905562.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4dbe087af---9217145982.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b62c40df0df---vudafiporevufajet.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/tiwiw.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/da7niapvk3g1me4707kee5o5ud/xenesuzufip.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/86649201145.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/49019132090.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/begeteb.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210620214315_ga8xhg.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/4gd8c1dri20fs88lidnbt49vv8/wamusositarikuse.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/nmueu98atllk0b61v8nrbiojhg/40736006921.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc9e335058---80615723537.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608384abf2438---farov.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa63aeea0c0---10090388539.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/79094751740.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/segazulewugafivife.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/mowabapudadakusugajazeta.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/42444470695.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cdec199c6---jalijulosedovo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001436a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436A 17432 bytes
SHA-256: 939056253f99c8fc94046b991520bf0b31e60e2cf692bb1fbfc7360c4e34fc75
font_02_sfnt_off0001708b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708B 10968 bytes
SHA-256: d090423b8a722922a50064b118cc6ca9b16b0a858eec78ffbbd9840ef8e015ab

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