Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d152b63253394ba…

MALICIOUS

PDF

130.6 KB Created: 2021-08-19 06:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 058762a1126877da2e9d9305c151ef0d SHA-1: d4dcb439f3a1c1c445bfb98dc8527351299180fc SHA-256: 0d152b63253394baee46a7d8f5a934fe9bf54a8bc7865d6bef197ad59501e083
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9759

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 https://electrodomesticaruano.com/images/ckfinder/files/welesogi.pdf In PDF document text
    • https://amatnieks.lv/pictures/image/215911343.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fe7e2410e---94846169439.pdfIn PDF document text
    • http://ladue69.com/clients/876446/File/jinuwixun.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/newejadifepewuvazawe.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/a24f2da873122ac1c671a28e3bfc23c7/69311655952.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/xogomapapufol.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a12348bae---29493372277.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/783322af776f30f396feb456665523e3/95651241540.pdfIn PDF document text
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/8081557504.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/98895536026.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607836aa069c6---50869013188.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/s4h56mvba0ab3iefkl5tvmjo6i/80973885903.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa43df2241---gipepuzesoxotekuvekapuk.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/27926915066.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/036b0462e3f7604e49b1577f439d826b/vokenumekolawapipep.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ff4fcb66d70---bokutiwamanuwofebavizo.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/kakigiwegudi.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/bb791e3e6ff8b609aad8414a471fa880/wefililad.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/17831355464.pdfIn PDF document text
    • http://babamoleskine.com/files/file/gosejagekul.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/3569182499.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/18004245893.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c18412439---butijetuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=does+spice+and+wolf+have+a+happy+endingPDF 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_off00014622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14622 17772 bytes
SHA-256: 1d7196b4a9600bcea96728b648aa87e1524db76a06046f4b220fc6373af7814b
font_01_sfnt_off000173f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F8 10968 bytes
SHA-256: dd12281748975bdc818d072a829f776f13cc3377dee442f7c2b02646aece07b3
font_02_sfnt_off00018d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001a547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A547 30192 bytes
SHA-256: fb1542fcf02ccace8ac069e149d417202ce4a1b70b667e9e40793e141190e68a

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