Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ce3eeb3315bc6b…

MALICIOUS

PDF

75.2 KB Created: 2021-09-03 15:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b007fa79858e75b66f787381ae79baba SHA-1: 0b48758e777e785a4ad47bd684a08c5333316d7b SHA-256: 64ce3eeb3315bc6b8bb6909ff17733423b0ee2a9ba24bda17268cea585a2ee92
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download' button lure further supports a phishing or malware distribution scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbde40534d---83711877614.pdf In PDF document text
    • https://bulendengin.com/upload/ckfinder/files/bekatijaxoli.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105f1ec246a9---95273515820.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c8459afa7---82625348479.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d68f1c8a---bepowas.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210527_E62B5454398F5374.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/98461678672.pdfIn PDF document text
    • http://edgecs.net/documents/58432934718.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/xatifutiwat.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609b338a634cd---1014357401.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2df4f22097836f86d5c1cae134ac622a/14167593955.pdfIn PDF document text
    • http://strandedtattoo.net/file/63265641198.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/bepaxeruliruzoreku.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/4236716512.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97cbd5f06a---pisigu.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161290872b3777---wimowepalutotosolozewok.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///xirajonujop.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/78925038518.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/73459721585.pdfIn PDF document text
    • http://tayles.com/uploaded/6090745316.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b027cd035dd---21725963820.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/4284e130f4c9aba6d7a3a04d909c26ce/kixanegune.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/forotes.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/33383638161.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=lincoln+town+car+2000+manualPDF 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_off0000c405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC405 10476 bytes
SHA-256: bfb76052e18b6b32d5d08c440e819d9596afddae14a6840e1a517f6b2e28d21e
font_01_sfnt_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FA 16648 bytes
SHA-256: 10fc9e1b7b963b56df86302148dd5bd8c59f2c87a6e5d345c6aab2d46e8504f7