Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3e1901f39d3a2d…

MALICIOUS

PDF

145.3 KB Created: 2021-06-27 22:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ac51a51d4d92e8a5185fca8015ac0aa7 SHA-1: 21d092f9a0ca70a27266b0c9d61dd77f775ff894 SHA-256: bb3e1901f39d3a2d4663b3ff7440a06d9d60905a3cb833a0124682b2fd48db96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or redirection attempt, likely to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/10078b1c34e45f77b47bc98163b8d2c0/44023094963.pdf In PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc5d311fb7---89281379798.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834528e9207---sagugerizexela.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/49890502623.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/56596756066.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911d9153375---pimesitesanulurazevosoto.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/elde83caf6gl31up0fe3q69jpo/gavuvolatiperim.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c863444d1af---pukezofunutezidetazelura.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d090fd722b---46057951758.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/50817481156.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bff86d36b2b---73010342945.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/abbd1281ca650978e6aa38bd10f9b2fa/lofujasaga.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/79c1eafc405b70ddf695f0e2e2b7196f/4120165253.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725cea9201b---dowejovibamiz.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/jptss29uavo6jlma4g7r6bteo7/vizemuzipesitefabuv.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/827a3e3e7d732ee58f8a832a06cd9910/dafilimegajaxaxererad.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/8609b7cbc064f514103deaf4ce5e601c/xoziwuxenurolapuwikiv.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a55d2496bc---13987354373.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c990b4df120---94783447393.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/44878905740.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/zewuxemutokedatoxo.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794388ecb07---duwoxan.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/90691770753.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/3rs6agrhm32vnlkvrhvjftol32/vevumufebolafebilikapona.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7ade6950122ca5d48a4b01e4b1608fd4/40942278954.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/535c5f952eb24379c78cbe52348cee4a/25025473204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=application+of+chromatography+in+medicinePDF 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_off0001d7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7CE 17472 bytes
SHA-256: edfef05b25b4c000a9b3c63b6a935f2c9b1adb4a78e3cfc2f9a7077b644ed000
font_01_sfnt_off00020592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DA9 10992 bytes
SHA-256: 9fbb3dc5da2e89a3a810e5a66bf52e983dba95c2ec411e96dd4ba52ad3720068

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