Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df83062b0c9638d…

MALICIOUS

PDF

170.2 KB Created: 2021-06-12 17:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8dceea2d4b3feb60fe550a390ed804fa SHA-1: 839dba26cd2bf957325b6e9f22dc7e92af9be1d6 SHA-256: 6df83062b0c9638d999424087402fa66c2d7d776ab36a9519a444845960eb0fb
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://pixomot.ru/uplcv?utm_term=saab+bahadar+full+movie+download+filmyzilla PDF link annotation
    • https://bluetact.com/locktactyuma/userfiles/file/lomamivonim.pdfIn PDF document text
    • http://poorclarescork.ie/images/nenadogedurizivimobev.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/c1fffbfb650c27de9041f6d6d4e03067/598343443.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/2938176064.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/zisagudazeraxukitapapesig.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a919d960dfd---piruvepifomokiko.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/53983013918.pdfIn PDF document text
    • https://vpntraffic.com/upload/files/pefuniratisawagurepoxiga.pdfIn PDF document text
    • http://ned.ru/uploads/files/50347975383.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608384599bdc7---mifabejaredakalapo.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8bc201a7---68388545031.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/i1t32bdp42l6m7a9ol060t7mid/63695211148.pdfIn PDF document text
    • http://usmleworkout.com/files/file/406865419.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/cecm8uic7h6ou8svl5oid8pth4/seripapox.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945e7eca05b---gajeresuwexafexewixagake.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f316d902f3---kivawiritipebigog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001618b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1618B 68688 bytes
SHA-256: 7052e107b2c4b67d74aa8e17c1f31963a79f746dbe1f20a912065941411d9b3f
font_01_sfnt_off00022f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F77 5516 bytes
SHA-256: 945ee27453359db48d7c7a19d80dff5cc080d304559f52abef3b3295a1d086f5
font_02_sfnt_off0002422c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2422C 13656 bytes
SHA-256: ef06ff86057dc1a51675c5b70d74e5b0eca185afa61b6a3fc6bd05928a1b940d
font_03_sfnt_off00026f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F15 19712 bytes
SHA-256: 5614ce97974b3dc6e37648d66aadcde48c135160263e5b9ac2bcbf1442c54bbf
font_04_sfnt_off00028f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F44 2836 bytes
SHA-256: 5d50adc772d450036cd1ab90751d134606da612e2644d7e9cc153757c1f00814

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