Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc30cc954f219911…

MALICIOUS

PDF

78.0 KB Created: 2021-09-08 00:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0f7d5384ccf5baece608f7b73506b915 SHA-1: 97ee6389adfeea6367193cc8481bb2501425ce75 SHA-256: fc30cc954f2199118271654a9cd6ece0380b5cd35e3bee8380cf25915d51aaf9
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on disposable hosting and compromised CMS uploads suggests a tactic to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/48810936762.pdf In PDF document text
    • https://observatoire-omic.org/documents/file/jewifepujes.pdfIn PDF document text
    • http://polletnv.be/uploads/files/wupemulurudadokutazezur.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/g01dpu55t37siffdtkaad9dd6q/40710333506.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/a4f9c516d655faef32ce3481fe2d1700/mewiwagomosatasipolomam.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/15531413387.pdfIn PDF document text
    • http://devison-matras.com/upload/file/88526692076.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a13f9963556---rijipetat.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/rageloririz.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/85ecbb852211b94603be4e491b3083bd/deborosubike.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202108210607213856.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a15d4c2c623---18542707603.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/ximuzedeju.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/14892345329.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/psgk5nu3oeth2f5k4ncoquiof7/bunewepamu.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/84616843545.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/36732120159.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/mowezumugeputebigiwigole.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609861f2963f6---71074066688.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed629e3435f---zividitoxakafukena.pdfIn PDF document text
    • http://kotolantopeni.cz/file/xenorimakozumikewitabil.pdfIn PDF document text
    • https://tepihtrava.rs//files/raxitejimatilatinok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pythagorean+theorem+worksheet+grade+7+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_off0000cb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2B 11152 bytes
SHA-256: e5e817522a62968a73f630bbd28ee16b13a04926f3f9b4ecdf66ce8ae99f7513
font_01_sfnt_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 17676 bytes
SHA-256: 117abb0b3d41e18920fcd55ea51c5ccccb88f1e37ad70674f92c339132786081
font_02_sfnt_off000112af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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