Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe202bf63cf124a…

MALICIOUS

PDF

82.9 KB Created: 2021-09-23 09:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: fd43cc5d52a524cd14018aa8dc0ca236 SHA-1: 30a7b4a81b8354651da52cb7b59609b20507d561 SHA-256: bbe202bf63cf124ac1ff8b5bd5750673288c9ca77302f3d0b78a6dffee76a809
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including those hosted on compromised WordPress sites and link farms, suggests an attempt to redirect users to malicious content or phishing sites. The heuristics also indicate the use of urgency lures and download buttons, common tactics in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 9

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://synerhu.ru/uplcv?utm_term=fortnite+free+download+apk+android PDF link annotation
    • https://belretail.by/ckfinder/userfiles/files/teziluvoj.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/wipijuliliwufupor.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/kijuvigufufaperififif.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/c14hmskcgdia1i7capp3fb4l90/87547058193.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/rozotobevutisezotokogu.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/tilibolug.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/95102117683.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/tupifulorabegabom.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/8694b254d17f1f7413b4f9e9e07c0331/60083153191.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a32f28e276---baxas.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/82997089442.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/bokiralag.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/30902122152.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/37877788961.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/xalomipojomunojufonebuda.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/lavudasotowego.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/fizum.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4a105d1f79524a22c3cceaa321cdb280/85995567111.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/75831814282.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/96256791142.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/lepiwu.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/rekaxefusejinorume.pdfIn PDF document text
    • http://findusafranchise.com/files/files/pusejoveb.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_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 10480 bytes
SHA-256: 05eb94737c1fc46636090d9cd18b517a0ab41adcdf1d040a3bc68822516d18d9
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 17472 bytes
SHA-256: 1c594252ffe0563b2dc3d203bec16775b7e33dfd6c894998694a97b9df59f1a4
font_02_sfnt_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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