Malicious PDF — malware analysis report

Static analysis result for SHA-256 e066bb91769f5e2f…

MALICIOUS

PDF

85.3 KB Created: 2021-09-15 15:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e5d61b40f25387777ab1c9b659b98097 SHA-1: 966458f4564134e42bc006963ac9c06c8aa63816 SHA-256: e066bb91769f5e2fa7a1c536b29b4755dc7254a844d7420b5fa3caeeb95ab982
204 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and is flagged as malicious by ML classifiers and ClamAV. It also exhibits characteristics of a payment redirection lure, suggesting it aims to trick users into changing payment details or making fraudulent transactions. The presence of multiple external links, some hosted on compromised CMS uploads, indicates a link farm designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://casadiriposomarsala.it/userfiles/files/92727830278.pdf In PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/88427567569.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/41819879688.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/59500123366.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136ab22f2a43---46451159181.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/nekeju.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/53336691552.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139eaa675a55---73240055804.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d06a7cd96---76991306838.pdfIn PDF document text
    • http://wmsone.com/eimages/file/lujijefuw.pdfIn PDF document text
    • https://photofetimages.com/19952066100.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/vezitijeduxijemubimoma.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/lemiporizir.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/130048292030.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109070649458936.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/1843348060.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/nejeritebupefajamerawu.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/zafizonidabopiraleku.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e448853b61---891372513.pdfIn PDF document text
    • http://chineseclothingonline.net/File/woninewasafizelejanifofo.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/14421188308.pdfIn PDF document text
    • https://petek.biz/resimler/files/96952275219.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/54294187403.pdfIn PDF document text
    • http://industra.sk/userfiles/file/nojojozederesu.pdfIn PDF document text
    • http://sdds.be/userfiles/file/77847974690.pdfIn PDF document text
    • https://tsegypt.com/file/86762404329.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pokemon+go+simulator+apkPDF 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_off0000e638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE638 18500 bytes
SHA-256: 9b75292b0f32dca21c531277f9c6bb19787e53f9280d4110b1832f1154016000
font_01_sfnt_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA1 10788 bytes
SHA-256: 0fc8c5a3946099b830941e39ab146109e2001147621883d226e1880301c73d1d

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