Malicious PDF — malware analysis report

Static analysis result for SHA-256 abab901ea96aa48b…

MALICIOUS

PDF

70.2 KB Created: 2021-09-14 02:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: adcaaec3a9fe757c08355019503beea6 SHA-1: 1a260a1ff5c36e4d91a13518714a2b185a333e32 SHA-256: abab901ea96aa48b6cdb8704364bf0a28bfa5673981aa9898a86c4541af5fee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is flagged as a link farm, with several links pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the links suggests a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://allytemp.ru/uplcv?utm_term=fs+14+hack+unlimited+money+download+ios PDF link annotation
    • http://tatishev.ru/admin/ckfinder/userfiles/files/24466770949.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137293916cf8---mekegenafaxasisifad.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/84721000511.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161308f73df5da---tevineniwatumotivokifikiv.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210903122439.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f07efbf5e0---fuxofarenifenomitet.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/91399490537.pdfIn PDF document text
    • http://dd-eng.com/files/files/nabaturemipekon.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/86472919534.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/vogowepubufogizomanujon.pdfIn PDF document text
    • https://yodobashi-church.com/zaradazazisi.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/gulofanof.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/favubowade.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16135c3669208d---mijebakodajuzenigopeba.pdfIn PDF document text
    • http://preiss.at/upload_files/files/67762411013.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbefc6c578---83473071016.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/tesumomo.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/suditozuvikobasegesumo.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/mikojikabefigasuroxanixa.pdfIn PDF document text
    • http://kangmeideyiliao.com/uploadfile/file///2021090507513754.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/75312603143.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/2459112494.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_off0000b2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AE 15172 bytes
SHA-256: abceaf620b42b51bd76233caa6fbe87066fa0aaf9f308242e3249b0b2a16d411
font_01_sfnt_off0000d93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 11032 bytes
SHA-256: 4c3815e58cf138c2b7ec95eb458a62835a20ccdefd2fe1fb7de6410536fc0a6f

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