Malicious PDF — malware analysis report

Static analysis result for SHA-256 947227983de72b0e…

MALICIOUS

PDF

94.6 KB Created: 2021-07-28 07:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 23a0dc96dcf6771af4b8559846b94240 SHA-1: 5dd71edb4427f6880b02380d0b092eb310ee2bd5 SHA-256: 947227983de72b0e24417fdb0d6e482f3aabaeb5762d03e82a100bcddbd655c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://collegemahan.ir/basefile/collegemahanir/files/ritolurokobabinopeja.pdf In PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f182565ba77---resifeno.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/tewilugusepibapiriv.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/53989892875.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/45057388402.pdfIn PDF document text
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/36764524026.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/53dd4497b7105de1d1e9f4c1d19fab5d/4633783457.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/74e467210f172ad13bb654132b5cf6d0/pomubejipujokedajavagen.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/pivatisebujozefonuloni.pdfIn PDF document text
    • https://ijpdua.com/contents//files/69382425116.pdfIn PDF document text
    • http://cobbpaynefamilyreunion.com/clients/862770/File/timakovokivenomokonaxu.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090be8b2f7eb---19623418032.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/7434747252.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/zujobesamofalajupukol.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/79055995761.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/ofo3l3ttvn6nbe21uaqe45aoe6/87616916048.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/hfafs4q309cqo9ogpcvfnhgtfi/mabozokademesuzavemej.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/92f9ac6f24d37864278a70462993f9c4/wuniferawagasulosaju.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///45214446271.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58206ce3e0---97620377214.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/80505397299.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/k2us8e94rn38esi9d3ojo2co84/93541027056.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfdae440571---7625619080.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/pp9ppruupde1up509a8n3vcvpl/33578045479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=kenmore+series+500+washer+disassemblyPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 17808 bytes
SHA-256: 4494163538f2adcf8624cbc7fbe335d68ae2130907b98da6ae71257e86472d7b
font_01_sfnt_off00013174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13174 1776 bytes
SHA-256: 1092c062515a0e7c9fcf1de286437c915e481785be0ae9a2f6895ca910c008c6
font_02_sfnt_off000139dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DC 11000 bytes
SHA-256: f98f6be5ee21a21450b8a4c19d4ed09f47c7f0a526e9ec6d8a98d8922359ad1c
font_03_sfnt_off00015345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15345 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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