Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bd98422c208a41…

MALICIOUS

PDF

90.4 KB Created: 2021-06-30 13:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e22c38ff807cb029cf74d64cd5ffdd13 SHA-1: 3260c6e12b7200b1b4a62c34ab11aa90c90ec293 SHA-256: 92bd98422c208a4191a347b068d3d5fd357edda08630450569d3cef257dffc03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to direct users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://aashianarealty.com/file/1082157642.pdf In PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ddccb4cc57c80f3d8427c21430045ac7/menowevusu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607eddef2fe00---zupikemurekomuzupogi.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/pimuda.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/2csab8r73o0or91cjhgr676gb7/80777586420.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/570163476.pdfIn PDF document text
    • http://catgarner.com/clients/873270/File/notelenuwapulaxutesaj.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad26371aadc---femozadefeganogolux.pdfIn PDF document text
    • https://coil.hk/upload/files/kufogipefejojisefil.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/nenadisunitazozibe.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021042916371473499.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee25b097c6---81256268904.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/raroliropedepiwapowif.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729901de784---53752506115.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/44532027646.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad23c9997c8---fatukefatajinekumurogor.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e90c24cf63---bokunabemud.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/77447825167.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/j98k5c08jog07qu03qifumq48e/417546049.pdfIn PDF document text
    • http://farmina.ru/uploads/files/lapotafe.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/8ih6vmoggtkn4bsvn2a7p24eka/miduvapiwesurikef.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050321363372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=made+easy+books+for+computer+science+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001130c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130C 17448 bytes
SHA-256: 5a3670429d99239d9d8a55301412bed2e9cba71eded6210fd241fd5aa07b8ad2
font_02_sfnt_off0001409e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409E 11176 bytes
SHA-256: 9875316f4c926f8b041cfa6a599d336b85c0b85a9082c677584c09c074215b84

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