Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de1c4219a91a2e4…

MALICIOUS

PDF

84.9 KB Created: 2021-09-11 11:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: afe49bb5639df0d6d24302c09b6ff25d SHA-1: 9e8e8b9fe16dad6582bd53eed3aac8900c94d7cb SHA-256: 5de1c4219a91a2e44e74c78e8b1ff05ac3f1a25ea7dced98b13ebdde8b261419
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to potentially compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's primary intent is to trick users into providing sensitive recovery secrets or private keys. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://gt-outillages.fr/ressource/site-image/files/rekodukevezuvozej.pdf In PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/xokusukapesunuvusuferavot.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/kafekogitafufidemerikap.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/godalinivarimalape.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/xerosuvuzovabit.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/33029576673.pdfIn PDF document text
    • https://ka-base.no/images_students/files/deruj.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/26264267227.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/fubepulegapebagadezo.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/515594384.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133a9b4826c9---78631518525.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/xubokabelafebaz.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/rikebaxevapalasanatamile.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360d806c21f---wosodefajorolopejifije.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/gililogikatujanijow.pdfIn PDF document text
    • https://cosmopolitanhotelbg.lastrada.bg/uploads/wysiwyg/files/lagididiravosawutijila.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/17f3d70f5eddcf88b6b9a73b469ee8c2/92991623478.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gumolaka.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/47635921793.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/66369219994.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/r2h12h1po35sdsa6t71evf8uan/kokasopunamukavuzeperiv.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee0c33c803---baxikivumodipisurekagini.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210903224256171.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/lofanikalawan.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/lirosele.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/wobomowenimanof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=general+practice+book+in+pdf+freePDF 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_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 10716 bytes
SHA-256: acafef0a92e47a79a7fe254d3624981d0193357d68c25c6066db8565e575c7a4
font_01_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 17868 bytes
SHA-256: 798f09d08d071c731bec315daf8af7f1be8e5bc3d685c3ebc6caaa483ceb890a
font_02_sfnt_off00012d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.