Malicious PDF — malware analysis report

Static analysis result for SHA-256 3459462a7ded8ea7…

MALICIOUS

PDF

86.8 KB Created: 2021-07-02 04:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 30a830a55876f827be6eea0c170e2b1f SHA-1: 6aa24f3263f24de43fc96bbb11faec5c734c851b SHA-256: 3459462a7ded8ea724a8173b2815bff6df66bbe45f3861633581bb77d426c215
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document impersonates a cloud file-sharing service, a common lure for phishing attacks. It contains a link farm pointing to multiple compromised WordPress sites, which in turn host other malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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 http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072391f8d0ae---natamo.pdf In PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/b0b65d1aff0a5a5647c56d283967baba/74384203773.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/20866167192.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/8cd90c8cb9247fbeca1a0235357a2c79/binokafawitotosikiga.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9312331f5c9f6848c3f14f18e0fa888b/kujujexegopisuz.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4708606953---zosutud.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210626202139_94yjlj.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/dojutipusaroba.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/175ade4020c6b42971d326f20a86f8c8/89663263549.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bd0984af6---dexejopupegozepon.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/zofidulaji.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/45bta63rhik4idofcq0oms6g12/12613914296.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/44570394505.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/728caffbb4d2d11f085f67ad3791c4b6/49467651176.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/93d876297fff2a08e7930f816116aa51/zutawelizojam.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd793f1402---81339833302.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/sajowodorawufoxebafubines.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8713a8f122---zegoretetelolalananowuso.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/7441274961.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/44b872ba5c55f1e63c1115cbbf167157/36253200206.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/kitisofaxowa.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6t01jvb1846s952bjhgvvukbd4/megadeka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=office+outlook+free+downloadPDF 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://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_off0000d96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96C 17176 bytes
SHA-256: bb59282e94fb07e4c14bb404187a8eecf0f59e1e8189c056e768591d106a50d3
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 10604 bytes
SHA-256: 595226ae97da61f770dd78df59ac29e803c3db2c24d06812a72758a5e1dcb07d
font_02_sfnt_off00011eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAE 16664 bytes
SHA-256: 28cf435f8b16abe85a4bc1a1207479adb7893d6d485ccb0514cba46f335cdad3
font_03_sfnt_off00013583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13583 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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