Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc14fd50b9ebb39b…

MALICIOUS

PDF

87.6 KB Created: 2021-08-10 11:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: db24ebed977c53fc0d0a7a74addb8a48 SHA-1: 22734ec32aafb419740ad36e979584e887c005b6 SHA-256: cc14fd50b9ebb39bcffd3d61bd9862de5be7e0ad458aa5a4cc8edfba524b35e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, suggesting an attempt to obscure the final destination and evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://app8itebarandgrill.com/admin/images/file/memaw.pdf In PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/senabenajokagu.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/04938e5a02669d02febc69a74ccfcc48/3280129696.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/a39ec7f87627b03157c659f5cddd18f4/87080322489.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/bodokutom.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607759dbbbae4---minifaz.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/8cc5e7b886409debfd52193c692c5bd1/nawixubotojumorij.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/wogolumakevujiwefu.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/3017053248.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/95179277154.pdfIn PDF document text
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/95781877701.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/43630890799.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098932dbfe7b---papemozuwotol.pdfIn PDF document text
    • https://drsaman.com/files/68270289539.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/sapobeloxuniza.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/95821645428.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d498ea842---51766349836.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/adst48mvaq9998lsbperu8t342/fosununipibobijivekig.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d5f29c4e4---wabepam.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/74325651636.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/menodi.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610799c9f3c25---35279353866.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/boromisup.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/67284618428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cisco+lab+2.2+2.5+answersPDF 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_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 17316 bytes
SHA-256: 45136c8e2aa7f6c7f2f52d97c03542a337aaacf656dc251419a7b580d631b2d0
font_01_sfnt_off00011d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8D 10700 bytes
SHA-256: d75056cadaee6d9731000d43a52275f259ffc4963856727ee2baea71878b9080
font_02_sfnt_off00013667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1