Malicious PDF — malware analysis report

Static analysis result for SHA-256 012bf0b2a726a3f5…

MALICIOUS

PDF

79.1 KB Created: 2021-09-12 04:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0a3d58054a99b12abdbadf13498ad36d SHA-1: 9b5d2229d5522fd691e6e330617ea4cca71642c3 SHA-256: 012bf0b2a726a3f560899029377d088afae1d3407bc9c47cae7b632adce4c20f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://korankertas.com/contents/files/pujafike.pdf In PDF document text
    • http://ingenermarket.ru/userfiles/jenabafav.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/kosof.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132047da430d---22892285330.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210912055627.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/podamosawufarinisotur.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/48036814328.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3gchn08qm0n3vbqoj3f9up99qu/kujoxad.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/woxuvidexivabo.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/17619382231.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/vuxoritebifiluv.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130c810e896b---33940025316.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/xojobewaroduporix.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109120614236810.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161358a6b46924---95020395870.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/685848801.pdfIn PDF document text
    • http://naturpix.ch/cmsimages/file/53480945752.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/25062098280.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/xedurazujisusolok.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/mijavudemowa.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/9243346722.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/33155516250.pdfIn PDF document text
    • http://dyccpharma.com/upload/files/tumig.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613844bf41243---53382050895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ninja+kingdom+androidPDF 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_off0000cfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBD 18252 bytes
SHA-256: 85792de70e25990f6694cd940698cad62b1c746cb87d7942e9d8ca5664216e68
font_01_sfnt_off00010002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11819 10344 bytes
SHA-256: d1db469a3239f4a49d238041743953a3c701ca09a3bf04f199c8677e36368a10

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