Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0da9c057f75cd00…

MALICIOUS

PDF

104.4 KB Created: 2021-07-14 02:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4402e9e59fb6b35122efcfa58fa9deb9 SHA-1: fe2b25bc91a66f92692d288d69df7e282e17e3e4 SHA-256: d0da9c057f75cd000e848c3927636a92d65d2812044d1759dc59ee99e976f692
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or redirect them to malicious content. The presence of multiple external URIs and link farms suggests a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://huntic.ru/uplcv?utm_term=third+party+dmv+locations PDF link annotation
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/00148df7912c03ebffa667e29fa6ef39/12921580172.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c520770f4836b75acb68ef98ed04a277/55279422781.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078211e9217d---gopaxifebugu.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c3fba20bd---nodosezonefurapibime.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/21058726801.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/sd07up7ii79ub6hri58g3tr4ef/xonugiketakizaredelugisix.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/32610267998.pdfIn PDF document text
    • http://chineseclothingonline.net/File/vemomufutaramekawutekub.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/4q0aa362kc41ojveiimt44l65p/67642023376.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/b9191fb240f1c29567b5e790d8c738fd/kolivog.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/36430375157.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80cf2b168---13075995246.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/47158924475.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c8b8c9897b10f50286758b82f17fc40b/pawixizi.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/8lvkvlic98po74ejamht89k5l0/tinukaxinuxejux.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d509f8d34b---lozug.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160773d2c28c0b---18211323636.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/67cb33e3a3ed7a27e45d7dda75636f95/fatasalobogodinefites.pdfIn PDF document text
    • http://www.mediagrand.hu//data/editorfile/31740742311.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/pruo2bp0k6ef2b6j6la5u2q5e6/81291706445.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608158962b64c---xivobarafatutalerud.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/fademij.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/95836478238.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/10944267099.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/b6d4a549275f9f664a4c41adba45ad5f/80663862204.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1fjsabefdk78ekstivf15hol37/3494261920.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_off00013495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13495 10792 bytes
SHA-256: c5fcbaf57b8977d406ea6c2fb3b214004706bf98f917cfba9361bcc2e3dcd5d5
font_01_sfnt_off00014d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D48 18096 bytes
SHA-256: a82ba48da9aad83690a39815b7a249359de4f626f5a86b5ddcde619a51c9a93a
font_02_sfnt_off00017c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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