Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5b1b6a0f99dd1e…

MALICIOUS

PDF

68.1 KB Created: 2021-07-05 10:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d98a0586a915b78013e2198b27953506 SHA-1: b66bc4d90b2f077e29861fb3b8ae15d1a551b2cd SHA-256: ae5b1b6a0f99dd1e2d0f49a33c1c9c5610cdc6661acd5dc58a5cc0b219387fd6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous external links, many of which point to compromised WordPress upload directories and disposable hosting. The ClamAV detection and high-severity heuristics indicate a malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the structure strongly suggests a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5194

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://dgaspcsm.ro/ckfinder/userfiles/files/56350882302.pdf In PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb585665e67---31268316171.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc36dedb1---jibilobovifowafeba.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83843a605---rumurugijizidedoje.pdfIn PDF document text
    • http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/19367721221.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd0f2afff8---27262995092.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3524cc1bc693f8acf641da19cd092c53/sisagazapimapedupin.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7cd6aa47634e72724e6a717cce48c590/52610094323.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99a606bf09---dekule.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/75695187547.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/86368867993.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/36983446743.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/fasanosawataj.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/da97c0c681a5c92508a2e9cad12651f3/bisixogaloxigorar.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2843be1d0e607699248c83f2872d2681/74356916460.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/jelunumasexesomuzuv.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/k224g2jg62pvv5eue25qhhqgpi/sagubipenanudexipapar.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b37d61972cf---78321058009.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/tnoul87i33iv5gebe7454hv3c5/21033533923.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a197d85b6cd---47077480060.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/dabefukisuwibuwofafa.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/01b36ead04ec8774bdfcc7e812614c92/kudoxagizadejavan.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/44620218412.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607782ba3f436---jesalewowuzegopelobisa.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085be08dd3b6---58917562318.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/d48b089bf71596413fad90cd470e29e0/tusarevajinokunodinof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=mental+maths+for+class+3+addition+and+subtractionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2B 17016 bytes
SHA-256: ca7b6c30787a0ad064736729f424d5fb47c909c6043888a152b544e1fcfb6416

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