Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9e5ff95b9b1a2c…

MALICIOUS

PDF

85.6 KB Created: 2021-07-31 07:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bdf5d38c1faf332d2d88c9de69267e95 SHA-1: 7985324b578e6adfb018ebb1e3c19af8825cfb3f SHA-256: 9b9e5ff95b9b1a2cfac7a32b5c52eff847638296b7f9d39277a17c3d489a42a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/40325946607.pdf In PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/vphtpoklb0fe8hkmui41dti56q/50109885112.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/76650487792.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b37055ebd---rafowujukuzonukupidi.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/65422367295.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/fewojimedoxozoxibowe.pdfIn PDF document text
    • https://afayl.com/userfiles/file/27337965395.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/60550806466.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608079e84c568---suzidinobutujex.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeed0d7b23---nupajezeguferuzapobonukiz.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6ff7bad19---37812357915.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/1256847793.pdfIn PDF document text
    • https://orrizon.ru/images/file/75210771903.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/kixinenevukekagiwinajat.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160be428737178---nezavanej.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/40144796665.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/93699015805.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/likeledasowoxosusomozaf.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/37244cc8d352081c91044e7f9ac7455b/tazaresopuzu.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1a3eb1459d2b7641644a8f964904fd8e/10064888996.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/63548830762.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/h469cqs4svunm9pvr9ov9qufnv/bosuxisisidewugevodoko.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/381f0a76585807c324419b4438955765/voxipovuputamaxur.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071d87cc3955---denofizawemakamirot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=murder+mystery+dinner+party+near+mePDF 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_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10592 bytes
SHA-256: 0cc93312db27eb3e42197ec450cf1732c9fa4f0a14b96fc89c391a19f2152ffe
font_01_sfnt_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 16708 bytes
SHA-256: 601f5960cb49afbc1c4136c7f04b4e4dd271a19505a534d55b8d6f163ae531e9
font_02_sfnt_off00012f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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