Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a55a9cb9a8fa39f…

MALICIOUS

PDF

73.6 KB Created: 2021-07-14 06:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 60f0b569d7e4f77b58dc9f596318785f SHA-1: 00d8ca5f959241c18b9ef6c1f884cfc159ebd70b SHA-256: 7a55a9cb9a8fa39f20fb02f78afad1f7fabef36b782fd3d4bf55324db4e9f074
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple websites, some of which are hosted on compromised CMS upload storage. The primary purpose appears to be directing users to these potentially malicious or compromised sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://parlagame.com/calisma2/files/uploads/69255425902.pdf In PDF document text
    • http://hasyo.net/files/file/53230022953.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160766eb1ac146---48812368447.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/52732333109.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/5582205116.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40bc516093---pejimarofik.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/wuneludavir.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/0d64938466df7769a3d5f4c2c298b6dc/20297860949.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/92626403410.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/57242954831.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/tozelumaseda.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/471b5a6009649dcce50254cfa1443664/bazekedi.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa30a0990---dinunuvivifokogupiruwovu.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf4955a76f---todefowap.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/44210123525.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/xapolinakokekiku.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/kakegixinutevumupipikawo.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a068e165a6c---59828651784.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/rovafoxeluzunosef.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/272c942b19bc140de0af87afa8d4f796/3539132988.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/kewixexilisuximi.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/pra0h7913m5d9e9t9bq7cimukd/21429971929.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/66981975705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=your+word+is+your+wand+affirmationsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE6 16456 bytes
SHA-256: 18bff34c78ef7832f315773224592123d3552d9761fd35acc7a96982d3c5d9d8
font_01_sfnt_off0000e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 10620 bytes
SHA-256: 5d95172927c77ed8d6d9620e1acfe912ef7b65bc896b3a62efbf0ffc1f491389
font_02_sfnt_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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