Malicious PDF — malware analysis report

Static analysis result for SHA-256 92023f4a6abb671f…

MALICIOUS

PDF

83.6 KB Created: 2021-06-30 01:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e3a44eb4b2d98d5fa546d638c0b9a62 SHA-1: 2922ec122a3ef5080d52646328ae1f1db24f543a SHA-256: 92023f4a6abb671fce65e3b8441b71603591087592aad2646c9fa0ead2f60b6d
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 and a machine learning classifier as malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure indicates it's a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://pistant.ru/uplcv?utm_term=tug+of+water
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f71938244c---metoxodifufuvivije.pdf
    • http://ezibra.pl/upload//file/9979920910.pdf
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/pivubiketololatapora.pdf
    • https://najlepsze-w-polsce.pl/uploads/745150817.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20ab81644---dozaxedawizi.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/lj0gm8epqqm9nfrgjuo76qld20/97224734241.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/js2kafbe7snhc3tfmceu3e4has/wovujisejug.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4e00f764c4a7eb33242c0441ef2c81a1/49680171283.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd72483115---44909506209.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1cab620a---74897167172.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/49e6adfd4e7a447d524ba5fb460c1179/duzisux.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd6336e859---93886005851.pdf
    • http://zaun-produzent.de/userfiles/file/kekatiguxosumu.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/6jldhgieat80o4640abhl3fj46/nelunuxewikomugo.pdf
    • http://bafiti.com/sklep/userfiles/file/dowubak.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/e55b96f7e67be89639174c8319699043/46112028784.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/p1hbdochs305cktq3rqnjgvl4c/57578428637.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/26ec13d341a6ab689159fa21f18b08fc/maloxozidejirun.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/nakro3i7bqqs7i6ib9frivknm3/59313807979.pdf
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/141211554102.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d3098c101---26969178780.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f38850fe1---33742394362.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f3c56de9bac76f2ed53836bd41c665ce/rafozepopuxepu.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c3bd4d8064c706714e277203bbc3786f/44484797421.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 16792 bytes
font_01_sfnt_off0000f5f0.bin
28c5bcedffb0f63c0f18ed07264126f7c833899b916de9a351f9850be7cb6bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 1696 bytes
font_02_sfnt_off0000fdfc.bin
1844c37bb70a432896800b086f575c494869a8eb0769ca5c592305194453d38a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 16900 bytes
font_03_sfnt_off00012a25.bin
8e9eed0a186d7a24ddbbc19fa0c42fd0d6e805a44f7cbbd7e2c35e7d41009c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A25 10128 bytes

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