Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbf7183356b6f0f…

MALICIOUS

PDF

87.8 KB Created: 2021-07-04 00:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70ce5b01b743f77993c4b1ccb34db7d0 SHA-1: c73d5092c35f5cff8ef9db655aa890ebdc15d0b9 SHA-256: ebbf7183356b6f0f08c654ee891726435a2b1709e097d110f75751ea0c9191ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or lead users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/jvjuago6l9qf594l2rsp366dcf516o45/xevakitopuxosiron.pdf
    • http://m3hotels.com/userfiles/file/27977854167.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd4a667add---18735509412.pdf
    • https://areicon.com/images/file/zoxubuvojewisoveziputut.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608872d96ad55---zogawuzurowut.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/490aa6ac0d4317815e22eb0020f1cc30/53405111503.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a984ce5514b---xuzidixukobavevetozuv.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/mocbg87um1lb2sv2v8sg61qvv5/daparepafepu.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2e8a8d1c5---jigijosetewuvofotunujugaz.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/649a738066bab26ba1a0ebb5cb3d2477/gonapax.pdf
    • http://mini-garden.ru/userfiles/file/23865673179.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2437c73eb9---lifotexites.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b5da38b7fc3---xinevokudeni.pdf
    • https://circolodelpistone.ch/userfiles/file/kaxunet.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/86765819045.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb7e72c203---62774868235.pdf
    • https://transport-vehicules.fr/userfiles/file/linerofujumuvamuzaniloxu.pdf
    • http://ahrestygz.com/userfiles/files/20210701_051739.pdf
    • http://kimwendelldesign.com/ckfinder/userfiles/files/miwokigokabasogokekukep.pdf
    • http://quangcaosms.org/media/ftp/file/91992284451.pdf
    • http://hookmyweddingup.net/clients/73542/File/zirikakufelugi.pdf
    • https://thietbidienmanhcuong.com/upload/files/wugolezexodok.pdf
    • http://doks-films.com/pcms/content/file/97877781481.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/62e2d7cb86156a4d73a2cbb96d315e34/vefojugewavabekelulebepig.pdf
    • https://condominiovillage.com/userfiles/file/66893418750.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/tksc3r3v21uqprobucjchbpdcm/45898544906.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=why+is+my+dog+always+hungry+and+thirsty
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f47b.bin
8af2fc9b633002b2384d98ba4980dba567e41a640a5c42686851abee08eb0378
pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 17024 bytes
font_01_sfnt_off000120a2.bin
afedd7d874117f4741aa0d429113aedc20693fdbbfb0948d22e0ba6f67405e02
pdf-font-stream PDF embedded font (sfnt) at offset 0x120A2 10856 bytes
font_02_sfnt_off00013956.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13956 16792 bytes