Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce0bf2ee681a009…

MALICIOUS

PDF

101.4 KB Created: 2021-07-21 12:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e7c88e2712eac091d14c1faa575b46d4 SHA-1: 41e644ec69a282a7fe6271a41f859d15345f305f SHA-256: 3ce0bf2ee681a009718b9b751c47b205ef766eccc93c4b0a3781645abfde4858
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/852fe6c4b404d6af2b89a317440bbb0d/54034850415.pdf In PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc2b3dddfd---wadifavawasaxivafujepik.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6834bf64e3ba8a6e1cda535452ca3f09/tunajalesexowenuv.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/5ma3c515q2kldl89sjaldhj71m/ketetemilubetivoxepinibu.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7b8f0253db44c90f36dc532e83e01d10/45229464126.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/mafojo.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/4dae2ee40b34860751f1ffaac9a98dee/78095837977.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/tdle185vhb9urcmt23i7b9qskt/bomugafumufokefo.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload//file/tawusekutan.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8ff6c435772e5c549e98e4bd50e7fd6b/sajav.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/hp0nbj90ojtprbno5p13a5k3m0/94871895810.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b5363918047---18679056326.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098620b7201b---75879197670.pdfIn PDF document text
    • http://bidhichand.org/sahodyatarntaran/userfiles/file/joletutobugijugaxur.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/4391849724.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa45831fc2---68037817312.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/bedokeratalo.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160928bdfa12e3---80331140309.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/wuzigunenakaresil.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/ca95fe7a69827d102d696e70d1568699/75508654845.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/k54pkt2lr77sj97qjnml8bn1qa/waxezetowosuketezig.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/oqi2vhc0sji7o4m55i5cdcppfd/xupute.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/39050615317.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/9nsukg4mciupeo4me32998ihkc/54875017230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=baroque+period+composersPDF 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_off00012b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B95 10724 bytes
SHA-256: 01da53a69aafeccd25522c648c58b58ef06f1e03708059f41d740cbc87db24d0
font_01_sfnt_off00014408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14408 17624 bytes
SHA-256: 5c1acf7a0d9e0f24f2319275636fe08af5dc2e0b165db90e9424b69b1bde3a53
font_02_sfnt_off00017069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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