Malicious PDF — malware analysis report

Static analysis result for SHA-256 202732baa4922f64…

MALICIOUS

PDF

86.5 KB Created: 2021-09-02 07:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c7993879c63bd249b48915bd3c85c31f SHA-1: c4e912707f57c86087e74b16413d1ce650267dc3 SHA-256: 202732baa4922f64bf9e0340c627d1aa50478a0130be8d47de733100acd69a81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://rspon.pl/images/wyswig_images/file/lumagowoxawari.pdf In PDF document text
    • https://open-call.fr/uploaded/files/tukamiwir.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/27ce27b4d755af97dfd9ff3d1ed1cca9/tivadiji.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/simevabubulep.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210612062947.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/12207086569.pdfIn PDF document text
    • https://wonkingchina.com/d/files/sojebusunupa.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/d548648710a16a294c56c5da637c91e9/dupixonaluzejemakonixex.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/vugaxejetara.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/43755197845.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/labemepavawesenifiserud.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ebef8e40e---kafexuvuduvugagixisavif.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983df231e35---lidabepovezaforijezuni.pdfIn PDF document text
    • http://epoetryworld.com/clients/53741/File/97630097405.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/larekajer.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/jawarubakegusid.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830ce69fb0e---98987087891.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3086cccf65---22743384544.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/21292021384.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/xutozepilovejepij.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa8753f9f7---42763517630.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/menilininuguwe.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/49429575125.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/botisilusodovu.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/80246169892.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/23018728419.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=jee+adv+question+paperPDF 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_off0000e98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 18796 bytes
SHA-256: ccfde24ba8f6f98dfa15871ea8b916afdadae49680259c4c89d047cdd3249b53
font_01_sfnt_off00011a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A27 10644 bytes
SHA-256: 49dec6faad3c22d9137ab125870ea6d849b8e1f0d08f3f592ed6509b9a9ef80d
font_02_sfnt_off0001326b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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