Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a69104dfbfae76…

MALICIOUS

PDF

78.8 KB Created: 2021-07-02 19:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 17e8e923e7ef1f78318c3a4f7de46f07 SHA-1: 6372659ae1dd69d465526a1ffc359163792bf4e6 SHA-256: f5a69104dfbfae7611ec3dfa42fb80309309fbdcc56da5bc8c23fab49939d1c9
124 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to lead users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific intent beyond the link farm.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b66ea634034---72328000777.pdf In PDF document text
    • http://4grd.com/cmsimages/file/daxezeraduj.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/62145337974.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/46905022332.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/klaim923v6gjf1v6iji4ttsqs2/79415357174.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/f16f0a91340e9b192e3c8cebdb21f460/pipaxesazowamumoxe.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/zaloxeluna.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/066304ca5dadae3b7acb18ed2fb2c2eb/sujojosuruluzenozalomiwe.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles//files/nabavojir.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/71878342688.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5338460a596cd2b8d62e00ff00f61373/49306152806.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/8b12jkg9k1gaouaotu57pa9ra7/tusujutikevajufutik.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a007ff193e6---mubesakudejowoxusudodaf.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/20719422c22add6582c13029ac5cac6e/xudasepazaxezarevejigobe.pdfIn PDF document text
    • http://webbuilders.com/files/file/44341406714.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6287e2d129---13490965526.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbfc6c395e---3968049047.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/7c9737ab4fd11d2e547eaf6aa5c4a4e3/fipigilipuwapidijuguwado.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/11d3ded4c87aaecc0bca9406c46ddc73/18743789048.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/75b77ab40de6da298dd0738bf95fc040/butarixatawuxavodojarir.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4e6bb4f9---ketid.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c435d11c358---gozajudemikarov.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e7prv9l106tigcqtrktffefn7/98810772715.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/sakodevojim.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/43k757dn5tmmmg2du0scrig73i/29669670477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=station+master+meaningPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 10480 bytes
SHA-256: 002ea2dff4e5579c35533fdac9e9769c8bc007ac3db943f8f65bfb64eba705d9
font_01_sfnt_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 19576 bytes
SHA-256: ecfccae75a44c55a136e64ad8db678b86af293f89e72e8fefd822aa792ce0287

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