Malicious PDF — malware analysis report

Static analysis result for SHA-256 97947b96c6b212ba…

MALICIOUS

PDF

86.6 KB Created: 2021-08-16 22:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3490337d44975a67e73fde5fec54c522 SHA-1: 71d5c6fb580342041b7bea956f08502673534a65 SHA-256: 97947b96c6b212baf6b247b2c188e58cbf8323ee2fef38e67653897f4944bfab
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely to distribute further malware or conduct phishing. The document body is unreadable, but the heuristics and URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/e6a9f5d475accf747a57b0e04bf29389/14169483995.pdf In PDF document text
    • http://55thocscompany.com/clients/62662/File/kowadorovozefudaz.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/dfa63f874e8139879187e9ca9b115e95/mizoguzuxasepoli.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/bufulebezejovelovomeze.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b5aa2d9d37c0cf7071acb75576570b64/23659375631.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1ef2da29bf997f8dd20d6f38fe11da8b/lipejapupuvurapas.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/19756832368.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/tnuj5j6hj398chgjmic8ovm385/nixugesokosev.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/69707604180.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910cab085cf---maridogo.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0de5ab79d---71116939420.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2b5b6a8eaaa0ced4350ecc7b3a55c3fe/13051172921.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/761d62569d16e796f848bfdad52af956/magivugajizunufoduse.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/49b8ed88f8c28ede754b2a97e33b70a5/mofatugudegagofidapuvije.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/zimamo.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee4a64b7a---61901853053.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e073e973d---tebofokunibopobege.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/novifukilenamok.pdfIn PDF document text
    • http://hanahana.vn/media/ftp/file/fenoturitaxibamejiwuvugom.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8798f9d2ca---18782033137.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/99c7d6ce8e8befdb7c3152e1c311c140/dujutezolafikulixojej.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/b6e7aa65c4c2d7a83ab5a5185c98780b/39773016546.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/10417651207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=three+major+kinds+of+church+polityPDF 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_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 11284 bytes
SHA-256: 2bb056249fa4622e5ae77bd94d62cee6072ef42c950eb5730ac2e7359a852b6a
font_01_sfnt_off00010843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10843 16900 bytes
SHA-256: c09f2e4587d078c07da04075f2c8b780a3d1467f0f8412c49c7c5984bb4b79ba
font_02_sfnt_off00013448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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