Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa1f893dd84dc75…

MALICIOUS

PDF

89.9 KB Created: 2021-07-14 04:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 62a02b451842b6bfee34faec5b2ed375 SHA-1: dcd37cdf5bec356ea7378c05d0c870d0e5cfdbff SHA-256: 2fa1f893dd84dc7542870632c8c8a217235876b345b5697f671bf6a5cda9bf71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and is flagged as a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/uplcv?utm_term=swimming+pool+in+schools PDF link annotation
    • http://accomplishtheimpossible.com/userfiles_ati/file/loledokuxuzaxipileb.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a28de9ee174---jalukofivizipilerojaku.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/2adg8j11ctaf9gtvujbjipdrr4/90357667958.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/lomelolomowuxen.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/zolufekajutebi.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0c1f4ed79d2abafebac6d7faaa97bd61/zogutesok.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/86fb0ed562471765cd012113ef35191d/podezotepotejirurabepe.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/u151htat3ar60mgh7kuubchped/kabejobubodoledogiv.pdfIn PDF document text
    • https://hse.tw/upload/file/juzabenivogajuzodifine.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00521bdb59---37637955002.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/77607569658.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/77086741560a8e188ee2b0.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee8d13512f---sipezineg.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16091421892b45---kegopamutuxugabivibub.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/79712320362.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/70338641387.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/84i7rl9bh2f9i2pujs7oqmv5ha/60481070217.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/86782212873.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/34132773360.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/26714244408.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_off0000fb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 10492 bytes
SHA-256: b741c9b3fd077e4f79a6a2daa714bc6b3c89b451afcf41c0768fcbb795ed87d5
font_01_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 17920 bytes
SHA-256: 3ed412b13e2cdae91d9cccc086c55ad803ac2ceb60036321ea78a226f140bdea
font_02_sfnt_off0001411a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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