Malicious PDF — malware analysis report

Static analysis result for SHA-256 e450cbc1e7824352…

MALICIOUS

PDF

84.9 KB Created: 2021-08-08 15:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9cf41ba7bccaa90da86ae281b0e67b04 SHA-1: 1ad4e3ca1a74f8def164bb9d56ce888a65292e96 SHA-256: e450cbc1e7824352b8330d518de5066b100d5ed151177b8ed4d9d4369f904500
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b4f3cc9a---japanitevozage.pdf In PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/visopilutegipumabonatuli.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/nuvuramujebosud.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/sepasewurow.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40903b4682---10107932221.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/15040374802.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2657696015---50636039388.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fd91aa9ac---58443158793.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f14c154e6f9---76385605831.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f821888d61---nunizam.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160901ce105de2---tisoguxukosiguliratawebes.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b592e8bcc18---68468395312.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/10490206163.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/22184725163.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/72186bbf08579d13f51eef1ef4e036bf/88806601028.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/tadoxeruzif.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/f7133100e187b255bfc5fbf19cdb79ab/87330642952.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/45469298634.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/47323698782.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/evk371qolp8p4jdssn1r21reh2/24827622235.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/e37r6b8ngp6b38c657k7fotsq9/tifowes.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9c34531264f091b4682d62c83c66ea74/30914366501.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/4pn17apm5pf091opnbffm8glo0/12074777125.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/24029969516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=possessive+adjectives+english+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_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 18432 bytes
SHA-256: 912fdc08a28846e310e643f8ba84b9b05f2e9f1c72912e518d78c00800cd7daf
font_01_sfnt_off00011462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 10996 bytes
SHA-256: 419c05d96f915eca623374947a2fb0b6796d16a4088c383ea190c1c48b3f8024
font_02_sfnt_off00012dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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