Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fc5929c66ee2cb…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 01:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: f3282d93c050a854ff269a6217ff733b SHA-1: 8adafb0830919509fd06464e25136aad5ad4c20b SHA-256: d6fc5929c66ee2cb346f33a7c9b52bde15d07cf7e45385cb07853321e7ec4c77
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 are hosted on compromised CMS platforms. These links form a link farm, suggesting an attempt to direct users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=pubg+mobile+india+version+download PDF link annotation
    • http://stmarysharipad.com/userfiles/file/telomatoxetotawipixola.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/zonugufime.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/18500080675.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/16c04h6aep3v6ih5unupcdarjp/38548808880.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/6855329780.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/7668557228.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/mibexi.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/41850751316.pdfIn PDF document text
    • https://afma.pt/site/upload/file/razajereb.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/22442369946.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/87940355307.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16132b7978c56a---43103596870.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/zusosoxifamodogebopak.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b5eb6245a---senasemizigodasutoted.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/88771b0ecce22300e48fde8cf7a7bcdc/47768015163.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/13270568598.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/60623507421.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/jekuvimekose.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/65648193181.pdfIn PDF document text
    • https://sainaudit.mn/File/22774353504.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/59475599948.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/40183044904.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/82048539220.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/40359048449.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_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 10888 bytes
SHA-256: 57759c05aea94e5e9c37079637629cc527b8bc4ce3578eec85a381af2a2052ff
font_01_sfnt_off0000f315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 18256 bytes
SHA-256: c3feb6f4ef97653b9753235f93b062711420b521147ec3f91b545f22a85d4677

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