Malicious PDF — malware analysis report

Static analysis result for SHA-256 70911aac7fca0cbf…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 22:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d43db738642346f54b0415bab297c702 SHA-1: 5015a1003d62ca06d73be28e4d2eb408dde79dd0 SHA-256: 70911aac7fca0cbff3380c3700780c2312cef63a55d1a14fa0200d238f2b499d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with the characteristics of a malicious document used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://cructi.ru/uplcv?utm_term=name+from+letter+j+for+girl
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb707080dc---94723163322.pdf
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/xowewazojodosimutesan.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a76f35ced5---gidavawuwonepejavudeleles.pdf
    • http://goldnumber.info/userfiles/file/pixalegixuvasiradi.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083d75767f1e---32862049978.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160838c45f39e4---18846819996.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d92e860468---8233097164.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/6isr7huqqrol67s8cfh47r4996/wogupigagidazem.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607602e8104d4---vorep.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/45124c5a8de09897d5249c07d9494b94/fumarewufuzibadovusazes.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf658d4b76---gipiwusagixipowomosuvugen.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcb1bd76df---dozekifogixizowuvozobital.pdf
    • https://daismene.it/file/kokujepugobome.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/e67708fc9ebf55aaf77b14c8f2ba99a2/fejagorix.pdf
    • http://absolutelyneon.com/userfiles/file/86914900483.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160744194ee19a---bakemodekafakorom.pdf
    • http://accessprecision.com/userfiles/file/99922256259.pdf
    • http://andlupa.com/userfiles/file/nakem.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/1bfc1d2e5c4eaaa71e0a7a67f94ce209/11878593409.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ba7f69740---jileponusaxajotubipopisu.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/a7e5cbf7d80ffedb85e96a0e42baf9a7/39844201145.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e027265446534ebee465e0699f8f12d0/51644816495.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/b7d52d30a828296efce0e7b033310211/mafufasuwufebukegajid.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f5b095a0---bejejokumovemodo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe67.bin
1863b291dea9f6d473e8e2e9b4dd1e037396f567b94f76c4d75831a0795ce572		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE67 10392 bytes
font_01_sfnt_off000115dd.bin
e4174698dcabddde1cdcc9e2422d7bf280aa6cd412968169977c631a3ae3c7b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115DD 17656 bytes
font_02_sfnt_off000143e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143E2 16792 bytes

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