Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ceabd17eaad50b1…

MALICIOUS

PDF

97.3 KB Created: 2021-09-07 11:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0b49b230a609d594fc1183ccdc820db6 SHA-1: eb66aadc76686db0e23d191ccc8b1bbefcd4b671 SHA-256: 2ceabd17eaad50b19dbe60bf3ff917239eed0b671bf772a25d1ef7842571d95c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of numerous external links strongly implies a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://apexnepaltravel.com/userfiles/file/liwufaw.pdf In PDF document text
    • https://maintogelonline2.com/contents//files/tedunubaweb.pdfIn PDF document text
    • http://debden.org/userfiles/file/28386074196.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9c109fe4---50509889719.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/49768847055.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16108da82a4b5f---kowimadurafunewopoxuted.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e24a1a7f0582481105642e6f5d4ce548/pevakogep.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1be54032ecda0a51a00a62cf9ba72f66/92356042997.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b0a726e66da792b7508675fa4b3a93f9/dufomufemajukitafa.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/dotalagiwerufovovevafed.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/61c7ea0f926de01baa74175ff0492f97/foxisagigega.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160788bc8b62fa---varafulabulepaloxa.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/48828253561.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/08/15/file/20210815_091906_178.pdfIn PDF document text
    • http://samtle.net/ckupload/files/89405021642.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/94082352560.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/47291721806.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/vekoninonotixa.pdfIn PDF document text
    • https://ptogel2.com/contents/files/17980559980.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/bivuf.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/rarafewojaveke.pdfIn PDF document text
    • http://smakbyala.com/ckfinder/userfiles/files/jizebujefujuz.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb97d36334---jimududixirenudewepizal.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/90755556053.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71e6b9c96---ruladijake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=apics+exam+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 21664 bytes
SHA-256: ad88de82b320fd94b4ca11780d4dae824522fbdfd5478aed1c20c85e102bdba1
font_01_sfnt_off000130cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CC 16404 bytes
SHA-256: b6535a6cf817cdad640e5465cf8bfa6acf4cb79addf97afd681b6d2bc1688ee7
font_02_sfnt_off0001478c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478C 10396 bytes
SHA-256: 4fc2694055639bb5a47a8155c5974109097f451804b23e64c8027e6f50eef76a
font_03_sfnt_off00015f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1