Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f344caf69cdcd3f…

MALICIOUS

PDF

78.3 KB Created: 2021-08-29 05:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f9ffc183432aaf00db9075c9f14b6a7 SHA-1: 10f850e83eb53294923d50c89fd8306fc1002a6f SHA-256: 9f344caf69cdcd3f6823d6845b982a513767d980b8811e65f5ce0d3378fb31a1
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains phishing content. The presence of numerous links pointing to compromised WordPress upload directories and disposable hosting suggests a link farm designed to redirect users to malicious sites. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://yaqeen-eg.com/userfiles/file/90254173264.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a6209a59790f4b7a0bbe5d546bc572c3/polomujomutimofijibu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d5db12a9e---52836569339.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/50c4fd48ffaf82e0f65b25a65db3e4b5/16460953700.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3cb3618d4---durazemupulovawu.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d5b751923---42323409263.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c06778f85---fosijover.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/82odkbu6edff57jhj3ljflq5r6/18947616379.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/92988056796.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090384d9e451---51233030682.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210801230325229752mtgiaeggpahb.pdfIn PDF document text
    • https://led7.ru/file/6541474035.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/32376293389.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/28081969616.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0971f83335---11157892351.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c38a103a559---daziwunatexo.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/8184848958.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/6b5b5af5ce453bd06a23c10c126a1d5b/liwopemixuvototise.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f4006f26---33768123326.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/91525416482.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe24ab6fdef---17187871319.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/dapopomakoter.pdfIn PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/92233957533.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3807903679f83547bf2ffb962aea6466/24336359892.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/68839815721.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/60230041738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=low+ast+and+altPDF 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_off0000ce7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 18276 bytes
SHA-256: 7c61ca857d31094dce70c38470aed86589cd1e9f22ffccc78a51ea4b93413ae9
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001159a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159A 9960 bytes
SHA-256: 184235a39a40e49c1c522619297cea6dafd39fdb0c77ba86ed2a905f3b0f8871

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