Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74e9a1d85ce7462…

MALICIOUS

PDF

111.1 KB Created: 2021-07-02 22:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a660401221a102948b3399edc7d57887 SHA-1: 8f2d14644942623e5764230bcd9929e6c5c5a710 SHA-256: a74e9a1d85ce7462d94d862f4495cdac4c52cd4049369a1e29ba150b947dcd81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple websites, many of which appear to be hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kameleonhastanc.hu/files/file/firadimafakebeg.pdf In PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607922c1e87a0---29572671692.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/677b45c5e9b438703bd1a4ff9fb6b266/zasutag.pdfIn PDF document text
    • http://webursitet.org/Files/file/nibexemitorebuxoku.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4de852084a---kirasobolafatojijukis.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/29067797442.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcc539a5c0---8774350022.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/eb684ebb8ca1f301c1789af65bb5a3c7/808976401.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ab61b8f1650---57418574542.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/f9df3e456880e78c1de9ecd9596a3f20/porigedizomotave.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ud3963u2abh66q6dfhlo7sboc4/ripaser.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/togikujiwafadevok.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/wonejoriposesaxizola.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/butal.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/e1vs9rmu439drdjj525lj5i0h5/guxonalukuwi.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/k1tuac0fak90jnebtclimlboe2/pesufaborari.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/8107954519.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/37726846403.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/2247553939.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c63ede0cc5e---wogerafilipurug.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/pirikawixi.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1fcb40a6f0e1dd28f602e1fe45de7157/wokul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=crystal+gazing+meaningPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/478e4d0b27374c7ada2fbdbe82643bde/3845827038.pdfIn PDF document text
    • 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_off00015121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15121 10536 bytes
SHA-256: eada87a8169ff7b873069b5e6d0f3e8e8ea76294519c408ef7878633605aed27
font_01_sfnt_off00016928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16928 17472 bytes
SHA-256: c8a9b4d77e9e7148d4ba69cc8c213393ae7faa400683f7069286f71bdacef5be
font_02_sfnt_off0001970a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1970A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1