Malicious PDF — malware analysis report

Static analysis result for SHA-256 834ba0eec8c5d7b5…

MALICIOUS

PDF

73.4 KB Created: 2021-06-26 16:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 573bc325f9c3488c60771daa7db2c122 SHA-1: c189dc3055a1ea469c5da9bf21fbbe82d9848497 SHA-256: 834ba0eec8c5d7b5c143e2736ed420820d692b7c67e3cc3cffa844c86689e0f4
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple distinct hosts and the use of UTM parameters suggest a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

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://inwebjor.ru/uplcv?utm_term=creating+character+dnd+5e PDF link annotation
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/2dnkvloomng08vqka7sgue588f/letubejoposawuxojawutuja.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/sovedesilolitekirikunis.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862f2aae4df---34913993693.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608913ad230c6---83249540581.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/4262380411.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/59452549781.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/vuwaw.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/bonogeviv.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/336db3459fb3e07a1f293e8806d70d00/domoma.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/gutizuzikawopukagufa.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e4dfc22032f8f5140d473adaae85efed/gaxaresun.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5661b8d0a---46676227958.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949431a20b1---fitizumenukitodixub.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/8bd149d337227bcf547318c1c6d72803/50890180908.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/b4458cf4515fbc1f6d0de3bc0a0d40fc/71461938926.pdfIn PDF document text
    • http://hotstamping.pl/files/file/95934416410.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1335d607976df8d596589026d1b4963a/japud.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1188c526c9---joxofapixewa.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d2cc751b4---9522798356.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/zasuzixipixekeguluzuf.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/repogomofi.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773c61eb52a---97533306872.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/59404735609.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/640e092f4357b94497fe8742f2f0f41a/1311116153.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 17292 bytes
SHA-256: 5b8698f9a0dd28ae01d005ded81f5ccff26e6f99398eb67a95da3e90e34c7211