Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f46543e10242db…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 18:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2c37c1b36ebec32cc871c8c76d795125 SHA-1: 0af9f7602cd5fdddd90fd6bce176b0018be73f2d SHA-256: e2f46543e10242db8c5029331a950fad49d1963ae7eb566253d061db657a60da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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://aawyx.com/sites/default/imageuser/file/liverowebofoze.pdf In PDF document text
    • https://circolodelpistone.ch/userfiles/file/dofosapitaduleparubanaw.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/fopapajirofaxazofiwaf.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e60dc9e6e---5243339133.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc29e6b71c---71896230056.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c2291d82878f94a526755c85ba0bce38/vapomomepes.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/p2qd750li2d16i8ssmat4uu0es/73001150420.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7bb89490---36892050919.pdfIn PDF document text
    • http://claudiamelchior.it/images/file/95263378715.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/kodejoweximikuwavovov.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/zakuronepafolelu.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ae8e2e878---welezozidaxobiwifobi.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160dffcb61364f---70993980092.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082a61e935fa---37110839275.pdfIn PDF document text
    • https://faprosid.com/file/rumobiwipopi.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b891060ae---29786049516.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/57908978074.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6917cb2dd3---95769485304.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/tojupuwa.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/wumepoxumuteg.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160853fbf49df1---94226600793.pdfIn PDF document text
    • https://digiconelectronics.com/media/juvox.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/dolesinaniwemikirafakozub.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/fitijefuvoruwotelad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=pdf+bookmarks+mac+freePDF 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_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 17004 bytes
SHA-256: 9cfed572435925f626985f2441aa29bb36702b24611e5469bd8f678f8d0d805d
font_01_sfnt_off00010688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9F 10532 bytes
SHA-256: d4e8ad847b96313c71de7fb10f976376f684a6bffdcc6ad4240634676ce8be11

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