Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0acda6b2cf45be9…

MALICIOUS

PDF

75.2 KB Created: 2021-09-07 00:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 21df158999263f240adc4dc227de73d7 SHA-1: 32c6ff2fa24fde2ca564344f1e2a2fd8e62ffe9e SHA-256: e0acda6b2cf45be909cfa56ef32fc6f734c5d14cbe84f905e52f63eb2f5b1bc0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded links, many of which point to compromised WordPress installations and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of these links aligns with the T1566.001 (Spearphishing Attachment) technique, as the document likely serves as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wiskind.com/filespath/files/20210814120757.pdf In PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c506bc7593---80775906602.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/641c43279450eda0bef885306e2ded0c/74429024709.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/puposekezobasunitud.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/puwunaferedutetuwoxiduzer.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/xagodi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6bc83ca75---91514161983.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/sojuguni.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/55566917955.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/22929745557.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2b938c20d979792e893caaff1128797f/71725518833.pdfIn PDF document text
    • http://greenld.com/userfiles/fipajajax.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/8292905056.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/68780046020.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16102cd5665a72---tixudevowu.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/85941081421.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/subisip.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/29068766630.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/42164525627.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af74368e9d3---vabivebesejusiguposudano.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eadb85975d---10056317164.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/jafonebap.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076705343bb8---zelejuzigogunekozasisog.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c149dc375e7---molokupopitajibebobalari.pdfPDF link annotation
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa9704ad4e---zegesuvagenabazejaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=randomization+in+clinical+trials+theory+and+practice+pdfPDF 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_off0000c421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC421 15808 bytes
SHA-256: 7e127d888305aca73f10675516ffc89605d332b01a8ae8c125a10159a88affcc
font_01_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 11104 bytes
SHA-256: dc93962d1cd20a5e70a896819c84761f0c59a59af66c2ab9a414c5e66bb652d9
font_02_sfnt_off00010628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10628 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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