Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd786a27951c632a…

MALICIOUS

PDF

85.0 KB Created: 2021-07-19 18:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c7a444e19bd39fab1e44160aea0652c2 SHA-1: 86051ff0b845a42c673b1fd13906eb1306210a87 SHA-256: fd786a27951c632a377fb96971a6b6960e67db709bf268a9475f727f67a5a058
156 Risk Score

Malware Insights

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

The PDF contains numerous links to various domains, many of which are hosted on compromised or disposable infrastructure, indicating a link farm or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chief-moving.com/editor_upload/file/nasolawenadenisan.pdf In PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/oft2655kgtouu3r8p9gp9dg0c5/dojomeg.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/50535812973.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/wejuwuneforizixuzupagulev.pdfIn PDF document text
    • https://lemanssrl.it/file/45248848582.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/97425703138.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607fde9bbee34---32117367489.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/dapelogezomogilur.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/wazujobebodogorutebiboren.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/5bd047d9b71c3c8505902d70bbf89715/74249848984.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2a844b6eb5733fe4b65306e43d781ea5/88375219191.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d69dc353d6---41926814371.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/sabovalitoporur.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/demujarumegazuzotur.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b404790e4186a5327523eb3c7a3286da/56244354403.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/suwiminumenadavid.pdfIn PDF document text
    • https://cerquilho.sp.gov.br/public/admin/globalarq/uploads/files/6328837421.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b0988ce25---gumolupipoloxixe.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021052207512146.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/42530757373.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/82523739670.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/julivewew.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d336c79943f6ccf0980eacae454a1884/jabudatepodadusumaz.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/62159478748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+do+you+call+a+group+of+sheepsPDF 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_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 16580 bytes
SHA-256: 0c24cc8ca75d875a2d2a140a983f30a2e8a0017dd2f57c30c45cfffaad8e5d05
font_01_sfnt_off0001154a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154A 10912 bytes
SHA-256: bbbca8d2fa51535ae0c2cb0b791ef6ca67f838f7bae8b23399b097c09a8cf57e
font_02_sfnt_off00012e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1