Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce90a62fd9d65b84…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 10:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f2b13d18bea6cc97ceafb757e769d2f1 SHA-1: b29f8b0ec640d07420ce8dc0b777f30132acb4b1 SHA-256: ce90a62fd9d65b84c7737a212ffdd0e9fa9c317fac2750b46e175329fd412585
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised CMS uploads or disposable domains. These links likely lead to phishing pages or further malware downloads, aligning with the T1566.001 (Spearphishing Attachment) and T1203 (Exploitation for Client Execution) techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://murasakijr.com/uploads/files/14819334921.pdf In PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160842222857ba---29956771396.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/wodevezi.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/xizuf.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/d2ee6985d417e0f1b4f27b96afb2ee87/99358945026.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/piwamizexigedezavugukot.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/j9gnh501ci6vrm8s16hli1sio1/zuxugubivep.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2ed7beba9---mixugim.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/qti57g1jdiusp19s3s6b2g6afi/27141084612.pdfIn PDF document text
    • https://isleo.com/i_photos/file/72221290570.pdfIn PDF document text
    • http://apvn.info/userfiles/file/29165142934.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/kibekozajirorudedaf.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aea7ad829a---zoxariwutakegesejopali.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fb440986b---fugejipanokumezogubuwej.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/xamezunowiwidovuf.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2fcf6b64e---zivagududozogofawara.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976ab2305a6---muwilokorexuw.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c329b16565f---wejarewinivibamop.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34c1399b2e---41134541161.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/51853610706.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/xabiruxabakemimosum.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/kibijiwozefawovowizeku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=north+waterfront+park+wilmington+ncPDF 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_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F2 10912 bytes
SHA-256: c9d847cbf7a26d8826b4d2fe7b57d8a05da8ec47a9c046866199ef10dd2799a2
font_02_sfnt_off00011c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C10 17704 bytes
SHA-256: 80f08027beeb14455d044b5e3a4d1ecb1ab21345f0700036ea99ba2b2f05e489

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