Malicious PDF — malware analysis report

Static analysis result for SHA-256 d384086a4224445e…

MALICIOUS

PDF

79.6 KB Created: 2021-08-01 09:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2e23602a86c64443d3900ecaaed4aa9b SHA-1: ac662c47b66b7b7144b953b1ed7c8960fb249291 SHA-256: d384086a4224445edce38cb4c6b13811fa70d17a6a71b81ced1856d8b7ddfda3
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The 'utm_term' parameter in one URL indicates a lure for 'bloons td battles hack free download', further supporting the phishing or malware distribution motive. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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=bloons+td+battles+hack+free+download PDF link annotation
    • http://pkynfe.net/userfiles/file/nedibarufavosufemesuka.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/43897809237.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/91740334247.pdfIn PDF document text
    • http://imaginove.eu/data/Files/mipog.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070410991b6a---8168563384.pdfIn PDF document text
    • http://chikatere.com/Upload/files/7049951046.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/hmq3u0j3fenfkkhu78r9usvel3/10166595097.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/zifugujadogiriluzox.pdfIn PDF document text
    • https://actor-conseil.com/files/file/buwuvaratewegixi.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/63323956655.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609abe2d58e59---degovazixudarofo.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/35248263726.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/84843914768.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a40fc7ba58c---8269985065.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c94aa25c34e---10415351860.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/kojagoditetuxisekof.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/38618670883.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/594t5h8i42jtquutda6c1aaft7/27770557285.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/79736675055.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/robaxozabovopejege.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/14e1c54b0af7bb73b4ca40f65d051be6/jisavajibukewevatodebese.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac588e8ea21---19281097722.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b0e08538d26737f16bcd3076835fd266/zapavojamupif.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/79615457008.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65c8041a96---18266375661.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e191020b3---ponexiwifixami.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_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 10852 bytes
SHA-256: 0c000ce1cc5b120ac2d10be29402aec0b6f49e38513e38ae5beeee67536b7b5f
font_02_sfnt_off00010349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10349 16996 bytes
SHA-256: 4021c263f091aaf00c9347b7f6ca4471177d2a9b0bb0f0734f866eb93edc8ddf