Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf90e9c2c4a1468…

MALICIOUS

PDF

88.6 KB Created: 2021-07-21 00:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6d2785535a6b75599d4c77badaae503e SHA-1: 3ae2cc0d8f135412185f8d1c105328bdf1105552 SHA-256: 5cf90e9c2c4a1468a1f72546b7c86c5b4366cd7ecabe66c512731abebe812441
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing websites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/01k4qoq5gldoi7gka5kpafffg5/nobikezofewerumitili.pdf In PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1840562cba6c738e493e6b8594a6b164/xosixajujofe.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/f2c3acfc4682798e16e1c6a77281baea/simezukanavosevugeziw.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ee150cdeca183eee1c25d4c87221d559/kesimopaxomijaxone.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/40799614507.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/io08fkcdgs8kt3h1i8r3elofuj/97961604746.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9405569ea---90528991089.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/64130416383.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/747a3d8c3c663873e88b681c4e333805/levilezoropuvobuvutuli.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/lupifejamukejurazodenokor.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9df28b1caab305f16f6abf2964c035ef/83289321891.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/wilazavodugebos.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb36614611---nenebagoma.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/47334257252.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/zebudoxenawaniwizoxolotod.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/43745176075.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/bupatibigiso.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a911158964f---19655348626.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/607e9afb022870da5c6b7b168845170a/sowusotavetatakoz.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/54qkgn8vs3kir6kgpk3fv78kvu/midixi.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/42363639846.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/xisisirolefiderugiluw.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/51883085938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=phase+locked+loop+control+of+dc+drivesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 10876 bytes
SHA-256: 315f828015cf8ad696688acf9cbcc8ec1741ba34804741b4b48e817d03cf9bea
font_01_sfnt_off00010d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D23 18508 bytes
SHA-256: 75d73d4a9bf74a665cb1c4004a8e26045db0385b5d0a71165ed45b49f26596e8
font_02_sfnt_off00013d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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