Malicious PDF — malware analysis report

Static analysis result for SHA-256 064f4ef533c43b20…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 22:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c12437c7c56a7ee34eb7fb4c602add01 SHA-1: 217ef854fdbe70037c26f2b0f646cc0243a6c720 SHA-256: 064f4ef533c43b205f3f3362d8671779dbd50fa0cbc6c91d42d9a7b0a13f4512
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading further malware or submitting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://drafthe.ru/uplcv?utm_term=pokemon+go%2B%2B+download+for+android PDF link annotation
    • https://www.seblocation.com/ckfinder/userfiles/files/81095668399.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/goxikolugo.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/29169200673.pdfIn PDF document text
    • http://sabancilojistik.com/userfiles/file/13600533435.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135daf66c739---luvuxumenowejibazalidaz.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/161411b0da754a---58117240365.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/01538a95c02db7ac0b023070707d05f9.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/zikuwesapix.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109131348353632.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/dexegoneluxuzuli.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/68826970553.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/78241399536.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/ad2354d7203331e489e0419001d2867d/66137709978.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/tajavulukixajovexuregew.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/40131815333.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/fodexirunad.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/bagobuvexevi.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/jizilozisupakoxerogukuvaf.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ffa3d0b94---69510651627.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/tavugunajeriwigawo.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139b8e9ec77d---vododozatizetem.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/35439064602.pdfIn PDF document text
    • http://nincity.de/inline/file/58397744376.pdfIn PDF document text
    • 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_off0000d5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 10612 bytes
SHA-256: 7cc62c3fe0d7ff67d24124b40081d3652ee5daff384c4039f6d4cd27a3b5d2fc
font_01_sfnt_off0000edcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 20252 bytes
SHA-256: d1d1ea69e455c0f472b6184fa02da5090d7cf6d459abf9a733f41552a82cca17
font_02_sfnt_off00012270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12270 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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