Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c0a27f2666744d…

MALICIOUS

PDF

79.5 KB Created: 2021-06-28 23:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 25c0bde93a8bb758bb92295b1d777e41 SHA-1: a36c150505e38e23ee979fc72c4fe44545da045f SHA-256: 96c0a27f2666744dbd42414d7c889b846e32e9fa958d7abd74ca70d8122a3aaa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=the+last+man+on+earth+torrent+magnet PDF link annotation
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e2955feba---29100419849.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160cb77082bea5---babuferabigexodufa.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/cd5f0f1b3cb485159a6f5664c2cfc826/26672877014.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3be7d0810e---23540092495.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1bfb65b28---11878160304.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96b3c70be4---29832858112.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5de02e0c44---78452818697.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/gibibebo.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/739bf1cf6fade1ec248956ceb32cf8fd/xesomubokifupasevonaxo.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2fe04dc741ce9946f379a8f3f6cbd5f/wasutuloremogofasixamuk.pdfIn PDF document text
    • http://splogservice.ru/content/file/70321242142.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c7373cbc8---61600610129.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608870990b6bb---gatiga.pdfIn PDF document text
    • http://apvn.info/userfiles/file/puxotomixigugijiw.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/79927756973.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fee6c3d8a6e19f0659d9bbdc9aaa3ff7/jugamikeme.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/36346420861.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/e49755a36f4a4200d64ddd6f9d9f7346/9598936372.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/7bc2b385c01c89837cf925e30482a0ab/kedomowomutafukuvegav.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/68509847451.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecceab1424---lalegodukepofugi.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cd080f1a56a---kubaxuzow.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1224cf3b710ac8a52b4c24e192c09f3d/95959654075.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/jopixufubejo.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/29118419508.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_off0000cce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE4 10428 bytes
SHA-256: afb799f327ef127bd99ef7e1958a042d6f4ea6c24a15b9fa3d7cb70c9d6d45e5
font_01_sfnt_off0000e459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 19816 bytes
SHA-256: ea7da3ff28169e32949b936972f4d9b26c0d4a0e628b5bd373dab7df70cbc748
font_02_sfnt_off000116b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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