Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c96f3cd64b531a2…

MALICIOUS

PDF

164.3 KB Created: 2021-06-18 08:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a02b107ff6a162b05244a9d17ce78e32 SHA-1: 95f8184f319cd54c189d7c8c88b107bb093235ef SHA-256: 2c96f3cd64b531a22c95e11bba632df13d889ff48c2c5e248609708340488e07
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external resources, many hosted on compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e1ce1d9e9a5b9b9a3bcbfa1c98081de1/88732970757.pdf In PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b06d8d75df2---zuvukibexavitekalovoj.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hcdbjj2bk27as5qsu5h1hhvsk7/nujubunilizeradukipagiten.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a53af1f340b---74524304796.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/669c2012ba140b4511aebbc2746a59bb/godowuwuvifeta.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/96a9f65ed1f3cbeaa7b9f0f845104b4b/nozikigolepuzizategoboj.pdfIn PDF document text
    • http://amdind.com/userfiles/file/32049887474.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/c525d94e15c8e6a8fa9997ca24b78afe/54988693583.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/92e3c008fb929a67c9032c419da2ca03/nojevubuxowoxewote.pdfIn PDF document text
    • http://houselandia.ru/files/17206513764.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/22303265972.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/xoxebafufowesa.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70a12bdc63---lifuzuninosepipefejikuz.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abf44acdebd---63378841529.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/07aad77bec01529cf2630a74e510d87c/lasutupaferodadafifari.pdfIn PDF document text
    • https://mclarenquartz.in/ci/userfiles/files/66446067144.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/kuxuramifevanizapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=active+korean+2+workbook+pdfPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19812 53432 bytes
SHA-256: b81a35cf0f1ac68909961cc8b836edbe065a06c142a03ce8613bfa1ed959e5c2
font_01_sfnt_off00022485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22485 5416 bytes
SHA-256: 192b0b010e4d11ba9a83971b680ceb1a5891aef0004423457a6247ca46a0be98
font_02_sfnt_off00023713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23713 1936 bytes
SHA-256: 246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
font_03_sfnt_off00024054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24054 11792 bytes
SHA-256: 094fe6e5b5bfeb555614c0a7871c96fb4507bf9df7665f89cad323d29f946182
font_04_sfnt_off000268b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268B8 18596 bytes
SHA-256: a5dbc783a41919ca7394b92fe9564099887a20d84bd623e96f83b2e4234b0130

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