Malicious PDF — malware analysis report

Static analysis result for SHA-256 62882b77e4907283…

MALICIOUS

PDF

86.5 KB Created: 2021-09-02 03:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b6ed51ceafedc9d8fac091494668ad1 SHA-1: b26f3a64442bdefad1ad1106c2a4600575d2dda1 SHA-256: 62882b77e4907283478ab7360051a618e188bdbcb216562d8f8390ff970ac446
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or scam campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=scratchy+throat+meaning PDF link annotation
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/83fe40248b30fd94f47934e02222f9ca/nixaxokolobuwevaga.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fee6c3d8a6e19f0659d9bbdc9aaa3ff7/jugamikeme.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/88042239470.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/xodubanagebatapafuxilu.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/68449251471.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/69098554284.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a446cf06b2a---lixizifejawege.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978b6c2b1a8---30323441345.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f764291546---limiwasemizazomigugole.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/nafusugozatedidep.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/kixulexagiwifesigeno.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608c677002a52---sijuj.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bf35f3edb---tiwapovovojivimo.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/68504073956.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c0980bcb4---sesejageguwovepazug.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/617c147326433d0f09e94c08b1697a9d/jujafunotiwelizurafi.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/c4512dc340f13ecf29cc15b00d684f24/18692805154.pdfIn PDF document text
    • http://factorysales.com/userfiles/files/64497262519.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d40b5d24f0---kisasalejerixol.pdfIn PDF document text
    • http://dzbnf.com/upload/file///68300411623.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/xanajorexowijomu.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/08348488738db29595ac548cdb7a9ae7/67956696764.pdfIn PDF document text
    • http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/wazisufi.pdfIn PDF document text
    • 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_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 10652 bytes
SHA-256: 6c6d2d90710c7c321b5e7713e68b078db2c6f8215a4ddb2d2ba98a5cf7c47e5b
font_01_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 17624 bytes
SHA-256: 33b02253eeae1c78e6129a1f02868475c89b9f9c00dafb0e787d57f3807659c6
font_02_sfnt_off000132da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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