Malicious PDF — malware analysis report

Static analysis result for SHA-256 495a0b8c736575c3…

MALICIOUS

PDF

416.8 KB Created: 2021-06-26 09:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 9c73d1ae6d896cd2d6fd215e4bceca24 SHA-1: ae07dcc5b243ecae51fa8f4629f84f73f61a0c39 SHA-256: 495a0b8c736575c384f9e741b24fd1a36c97011938c51256c309b18e129ebfff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7695

Heuristics 5

  • 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.
  • 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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01f83b2263---beganolonevi.pdf In PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/1f425153dc2b202d1a143b6e980dcf52/pifarij.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd4459caff---91424156063.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/41055805817.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6bb8b0d52---25598374073.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/bovelasagovagerexanutoz.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/1856b51934d1fc6f90d32f848b247dfb/89672535663.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b5c371563---nuridanedopuvapaduxa.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc6c743942---junofijumugafajadavev.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/genud.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78c89a1bcf---popamopexopogite.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ae7bc032e---71242800844.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/81250638964.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/96517046272.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/tominujutizidikurazopo.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/30838152728.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ebced2146b117f90d3a2403fff0cb462/sogujigovovuvajikarox.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/4fjqmhed8jcbts9rd03pk3l91m/pujim.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/9raqhg2n98oqov9k58u4tlk217/39367791944.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/37707331069.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/85aaec8a5c7f53b1727fd1f753a4f2ac/wajusodok.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/rfrrp688rbc8pcf3b1eoibqsjp/dowepijususefo.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/60528543243.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/39655609405.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4b90afeb1---tomesokubederul.pdfIn PDF document text
    • http://berbun.com/user_img/file/xoburezesozelewogikewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=gill+sans+semibold+font+free+downloadPDF 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_off0005ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDAD 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb
font_01_sfnt_off0005f2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2DE 32904 bytes
SHA-256: 03a4a9f265ad3fd2135caae5799be951581b7b99c9813c31425e8e5c45b30975
font_02_sfnt_off00064256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64256 10780 bytes
SHA-256: 04b5f59451497cebb3ef4e4905b98c34f23e9e6acc4a9bf0cbe6d534d50a03e5
font_03_sfnt_off00065b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1