Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecdb1a338461e58…

MALICIOUS

PDF

82.4 KB Created: 2021-07-12 22:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 50932c86d9d83f2e8bb52b6e1bdd5a00 SHA-1: 7a08038f940fbcaa8e27b73a0279745d2bbea975 SHA-256: 9ecdb1a338461e58e468973a304db8885fd3a1ef95d9cd67c56f52fd3b3d6f55
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of external URIs and link farms suggests an attempt to lure users to external malicious resources, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://ketchas.ru/uplcv?utm_term=aladdin+trivia+questions+and+answers PDF link annotation
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c92d34f3221---58486568601.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6c479373644f401b4b5a418a81a86f0b/kizegabadel.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/sapigawomebaluwedub.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072170c8ec8b---38641848789.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/0519f9d8543828bd39d0ae477f9de163/wawosoxijepuguxa.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e68e840bb---vemivalelomozazofutujepuz.pdfIn PDF document text
    • https://heyratacademy.ir/file/litevunotogalivarafolim.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/78923612803.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • https://tsydesign.com/userfiles/jws/files/29723672822.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787e89513c5---simiforumororomeg.pdfIn PDF document text
    • https://pindimana.in/uploads/file/fizunaze.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa374fee4---74316740358.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/93e412ujcn1mmdju3d0nni9buv/95234520879.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863492a60f2---rizoxav.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/gesak.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26b32c950---67136111652.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/mudorokenadakumure.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/nitugavojagi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a54ae15943---98697531185.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/25647206089.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/pemexavunerewop.pdfIn PDF document text
    • 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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 17460 bytes
SHA-256: a8f37cb0d0821c73175e5193c76f8755d5219cc17e59c1c255ec76515ab8fb96
font_01_sfnt_off00010bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EA 10620 bytes
SHA-256: 5b84ef5836372558c1641b8d075e367db49aaaf5d60f762d9cbd6d3f57c3a292

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