Malicious PDF — malware analysis report

Static analysis result for SHA-256 47febee8f5e806de…

MALICIOUS

PDF

77.0 KB Created: 2021-07-25 14:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bc799002af9ead2c1191a9c050a37dff SHA-1: e50f8b977f6995739e83284c0d831963a234dc84 SHA-256: 47febee8f5e806de96f130d7a46a00f3603ec512bce47ec94ac9c4ddd2ddb2ce
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/0b4a642a1fbb9bfd036d426f59f80044/gumafawimosenamofa.pdf In PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc55a818515---rinojudozudutonaz.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec1e539d887ee13012a138c3f20bb345/noxojawebogomibogutixinil.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/nowanosabibomix.pdfIn PDF document text
    • http://aven.su/userfiles/file/palukusabuvapetegerisilik.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/69321079673.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/tefizovageketeluk.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/f18d5e7f9772d02267e03d46e1539750/13353586615.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/cd919b545d8795f3fbdfda4b20c5ae74/nijojutozodek.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/vivepiv.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160884e5feeee1---58111472886.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/6826368d50e9f928e33a805b4aa1fead/wosuximefavometuna.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a771b4d71d---56797885662.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/pezuwagusizu.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/vexesitadabuwijilaz.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/tedulikoloz.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/datuzi.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/pelokavakuxeteb.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/wijebox.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/tnqrb84pektfui62jlt00shs15/joxofavumanu.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/miladesewof.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/nujupijeberugikimikikes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=dabbe+6+korku+filmi+full+izlePDF 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_off0000cc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC98 16392 bytes
SHA-256: ba0628e52e05ad01488344a828a78065ca14513b6d2f6bc59772217e7b6f8e73
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 10568 bytes
SHA-256: 933a5622d350e02989b386d1d034d2f4f4a831b94e6ac1a336b47d7cefc006b6
font_02_sfnt_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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