Malicious PDF — malware analysis report

Static analysis result for SHA-256 3479990715292f58…

MALICIOUS

PDF

96.9 KB Created: 2021-06-28 19:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d4c5379e03423abb5f239e647b17ce04 SHA-1: 43361842e8de771aabc81409c20b262b0421d7a1 SHA-256: 3479990715292f58b292ec64914919b8d9e75f2e170e1d48fb7fb628e0c91ac2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://mispuntossaga.com/campannas/file/42497233568.pdf In PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/kegunivurejavazono.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/eebbef2ad6889ebba33c72aca8910dc2/wubij.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/45ba80f1b683b8990570b99ed4668149/jexewokigug.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/67566817986.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/55387838826.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/dfjnphik8jt8coctn10rfke8v6/60711105150.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb53de1d7ed---vowowidaxuzezejureleni.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/fasow.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9eed8df3168a9413b10c25572996a5cf/xagonokomutididotojumuvik.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45e24cf6dc---furasimanenuligoj.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/929d02f6eacc56fb8215aae635aaa27d/konefixujegojiliwepape.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b6371baf9---30003317239.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/mli59ef2fdfmbtpt8had3h17ev/44636901013.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eefff4c06a---91238758826.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1126c68b4---sanuvu.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad97c143261---kibedopunojagixawizos.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/b8ebf87e7f42dc53bd112b4544c28501/18096030710.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/94381537192.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/380f06deb962a87dd34306feb5cf9463/30337336495.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/jobudamixobevujume.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2474950c8e---73195380184.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160bb744dd154c---wukixesizemotitet.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/86476116128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=carl+rogers+client+centered+theory+pdfPDF 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_off00011822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11822 16544 bytes
SHA-256: 0a91212432a51ce64b7296dacbe9a87507ba29b4e3bd80f938d68553852da71e
font_01_sfnt_off00014314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14314 11044 bytes
SHA-256: e68979cee11d65332bc547977c03117c5b3ee7b5b04ceae21eb565f4178dbfc2
font_02_sfnt_off00015c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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