Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c05e38fa5311e3…

MALICIOUS

PDF

85.8 KB Created: 2021-08-07 13:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 20aadc651482ed3d00a2a88acf69ec40 SHA-1: 8371e21a87c3f07eecfe56a7748ca5551fdc1fe7 SHA-256: 27c05e38fa5311e30b8ca601bc73a921a88a9260b2ab7e5c50d0823365010ccf
156 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, presenting numerous URLs that point to compromised CMS uploads and disposable hosting, likely to distribute phishing content or further malware. The presence of multiple links on potentially compromised sites suggests an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb5cd3c745---66723459364.pdf In PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607584dd2f7ea---45475553619.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/82606556584.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/23285461749.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/jetanexeteki.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/pekarag.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/29646179683.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfff782cad0---30872777487.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609730d59676c---76452266432.pdfIn PDF document text
    • http://htygroup.com/upload/files/19217032760.pdfIn PDF document text
    • http://beateromer.com/bilder/file/pizobetenukivaj.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf0888d957---65770850233.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/506fa93650136f5ae305d4eca1596074/dokaverulexokejosolur.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160770b016cd56---51398691063.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/69290733393.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/nniriombifncjbtrplqrsqnu93/dasekafatasijuxokumav.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a409326c1d9---kamemaxoxegakub.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///56143865848.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/tibinobewudebepupawi.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/77786035531.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790cae9584b---wetolofokebite.pdfIn PDF document text
    • http://artattack-concerts.de//files/file/pezapisukuziwiwo.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/704f68867944f67c7048c40f1dd987e4/xuwuzirumotanodopobon.pdfIn PDF document text
    • http://myphamasia.net/upload/files/wejatebedaxu.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607117bfd5f38---fawodobinalodesepokaf.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/94872325136.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/jsjlc4vedah6jkk973germtkii/kotafowelunememed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=jacobsen+mower+parts+dealer+near+mePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA44 17740 bytes
SHA-256: bc64835b80a3459740e32e6a2258b5fc956be81c8f402afdf0322e845976202f
font_01_sfnt_off000118ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C3 10800 bytes
SHA-256: 3e242e3a704a73622a0cd57b355f0f2a07d11027e3d5b1648080b6b559b58349

Open this report in the interactive analyzer, or submit your own file for analysis.