Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd5e5b27233b71b…

MALICIOUS

PDF

71.1 KB Created: 2021-09-02 04:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e7322baae608c6455d3ff2571ad5c214 SHA-1: df6a95ce96f7247eeaec98fe7f8e72a92d0b8e28 SHA-256: 6fd5e5b27233b71b4c7c83868fd51efd392573a7281725b645c84ed777d50e8f
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and likely a phishing lure, as indicated by the 'SE_SECRET_RECOVERY_LURE' heuristic. It contains numerous links to external sites, many of which appear to be hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing attack aiming to harvest sensitive recovery information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://smidgel.ru/uplcv?utm_term=asymmetric+key+cryptography+is+not+used+for PDF link annotation
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/figiponojebuxuwiboz.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/gofojuwusofuxukimefog.pdfIn PDF document text
    • http://napiarsaigh.com/images/20472798693.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096435f23b31---87398460542.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/74782030429.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be9158240bb---39227580672.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3d44a0d07---62337896323.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/98339892655.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/44893821778.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c104f623e69---66710390133.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6024e3936---70361625554.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ubc6e5o47nj8sla3o4dci55at6/tuwiwatoxufavo.pdfIn PDF document text
    • http://scro.ru/pic/file/15340782928.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/k624j9js4oakn0p5n06ibefn11/wawaganidimetizovebav.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/30107706043.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612dae51d3848.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a66164410aa---29825215421.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c74d76223---joroda.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/ruwisarelujosifidigodi.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/37882737108.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/89856936742.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/25228950516.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160984ba423fcb---13692988731.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d27b53c3ef---19593300345.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/7c5fbb39ff13ceeda361c3c7980ac6d9/wavumimonamisaxubugogate.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/28179432764.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

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_off0000b740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB740 14808 bytes
SHA-256: 7850dbc7145643af718444f5968fe7bc0dcb55708dec3d0b1e618d55fcb6559d
font_01_sfnt_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 11308 bytes
SHA-256: c66be8992d2a652ea4ff01704e0ab5d17b3e7decd4ccebfa4137eead97321a62
font_02_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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