Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e665f62ba8a398…

MALICIOUS

PDF

92.4 KB Created: 2021-07-10 08:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8b41afb02336aac7c2e3a55f0db8ba7a SHA-1: eb7c524485065ca4e60b3aabcb768473e3186711 SHA-256: 70e665f62ba8a398728227d37b61391e0021693de23f68f05e88239b96db3ef9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings indicates a deliberate attempt to obscure the final malicious destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://garglob.ru/uplcv?utm_term=enter+meaning+in+malayalam PDF link annotation
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/75534155262.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876f135c7e1---dezeviludemezan.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/fesajezatakitunukusupu.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/rigufusesoxalu.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/lojarej.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdd94ef290---42303862481.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/rewejoni.pdfIn PDF document text
    • http://thegioioto.store/upload/files/pilufo.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/kosatodogofudoku.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ceee1f2f4---4863612100.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160940be828440---95961594502.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/rolutixuviruriguforoxova.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c4d1d8786---970709393.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/528d86c87224bc26a5176d43406fd6d1/juxotojaxuriwetux.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1174995f6a---xavadisevejiromabuw.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/1133bbc96e4178fdfd1426e01abd839b/wubaja.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607330a7d4515---xuriteve.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/n5vugja5f9sqv8tnqbggj7egd9/waponaribub.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cde1265df4---22643775768.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/xewozeziseguli.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/33242832863.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/vnq0lb19fkqrh1giu0kqgf937h/55878603750.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608dde88a3cbf---20394726397.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/25974324669.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 16784 bytes
SHA-256: f19813224b4f05d63b4e9f9504329cd70152cdbda0fa2e211db1f62d936a7814
font_02_sfnt_off0001195f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195F 10260 bytes
SHA-256: b98f02cdb13080b3507d8e72659ecb1f4a9ffca4117a288130f2da3a7252ae76
font_03_sfnt_off00013060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13060 20456 bytes
SHA-256: 1be178ac08009912231569968937216cfe70e31a9be8d09005574afcf64c4e32

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