Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f06960a19956d7…

MALICIOUS

PDF

130.9 KB Created: 2021-09-07 07:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11b444a63d121a8b9d2be50ab68f4205 SHA-1: 1b6623c7e2c187876344047f863c658e34bf9787 SHA-256: 01f06960a19956d7cbec0c223361ca88803dd61cb71b3f575cc6c9a18858e338
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, indicating the document is designed to redirect users to potentially harmful content. No scripts were extracted, but the overall structure points to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://drafthe.ru/uplcv?utm_term=libros+de+calidad+aplicada+a+la+gestion+empresarial+pdf PDF link annotation
    • http://geodez.com/pliki/file/xesuwelazuxigap.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f4927b571---79186250172.pdfIn PDF document text
    • http://nhs1968.com/clients/65482/File/zorokebovibeboxibofaris.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/g39ra90j1f580iub8ihirgq7qg/29592491957.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/kuzewirimufazawozaletig.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077f55f91e43---75221760309.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/55518765664.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/bumesow.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/kajoxuwuv.pdfIn PDF document text
    • http://kurpinar.com/img/userfiles/files/gedewe.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/57500561015.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/4vr3snmvh368j15rs8p4b3jqv0/30120650610.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/61c3ee7b23009235fd5ff34db3379e6b/suzomoxawap.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/dopobufoxusajalatelir.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/26513118739.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/46687079199.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/22256268377.pdfIn PDF document text
    • http://gewald.ru/content/Files/79316107721.pdfIn PDF document text
    • http://huiking.cn/uploads/file/031418202004.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/27226957159.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a8b3f1fb---83285757345.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114cadf6345f---4000851589.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/sijetafu.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/57127127867.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_off000193e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001abfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABFD 11060 bytes
SHA-256: cb3f6d70db30136c02ae34983f57802df65de72d8c223421961481e55038cbc5
font_02_sfnt_off0001c548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C548 21996 bytes
SHA-256: 7305a115a672638388f8005a90a5f90ebf58baca8d20ccd839b483e36c3707f0

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