Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e259019c5aefd6c…

MALICIOUS

PDF

72.4 KB Created: 2021-09-02 14:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d4c143fa4aeb8328b238727ea1646a9c SHA-1: ef02479fe53fd9d00803c3a699f26dafb041a413 SHA-256: 5e259019c5aefd6cc3117d1a5e852fcd47c5ade1321ab1d2f5edc96d81da7407
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution lure. The document functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest potential exploitation or redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://nissanotogovap.net/uploads/images/files/kumoxo.pdf In PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/0v5a18od5o1vpofd7hmpte3ucr/75387682563.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d96904f7b5---vegolulosomepogun.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb49a35525---fitumumozopurulagomadiga.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/rijidifuwebu.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/sipegupopi.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/l2b6rooa0a0bejjharn7b500mo/87183740137.pdfIn PDF document text
    • http://ipceurope.com/assets/file/bapiru.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/segigadep.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/601429232612abd545c92b.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/c15d74bf397756e8f4ad2e9af4263f32/tobavelegudoviniwo.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/66964411140.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kijodidenapivigifiti.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d536d291f---lipifaze.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/649c29f300fc50cbceb674df4f2acfff/3478581879.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/cdbahn6o3ch0nfvhb235hn65sk/4269933912.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/99150891375.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/volex.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/31704628472.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bca9112b99---vupazanud.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8e7f1287c---80732060402.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/rejugurenidixuzegojanise.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/susifetiwemovulomeje.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607550a90df99---nelone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=phosphate+buffer+solution+preparation+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1F 15300 bytes
SHA-256: 2c19e4522fa21630649986212369b4aa42e7de231f55e2deb92102b9dfcd0c6d
font_01_sfnt_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 10836 bytes
SHA-256: 9679b736d750116ff3089f113c3ff5fbc2350226fd1945604d495f7761cfecdc
font_02_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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