Malicious PDF — malware analysis report

Static analysis result for SHA-256 701d49b07b33a0ab…

MALICIOUS

PDF

76.5 KB Created: 2021-09-06 07:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 211ff0784758f953433af0a284c832ac SHA-1: f114352713cf48208210554e04a25f17192e1b14 SHA-256: 701d49b07b33a0ababb6212e09c0da0f06fb3143dcdeaf7a5f2bf8e6aeb71be1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to phishing sites, likely using JavaScript for redirection.

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://allytemp.ru/uplcv?utm_term=certification+template+pdf PDF link annotation
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/f0aafd497cba0669993edfc19a4ab490/bafejogefad.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/311664c6e970dd82fceeda309a70d514/62199490376.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/29010827593.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/41839988149.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/71275274227.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/799647361.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606d05b12d7e3---tonosijusirusax.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/n82qib0t5cbed95md4rmk08r3f/74500865597.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84f5475bbe---gidijezomimezoxaloda.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c94b6feade4---59900345967.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/fusirupimanabuzuzitixagig.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba85a0d7fa8---38901755971.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/07/16/file/20210716_022927_116.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/tujevofa.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1d314e08e---58712807727.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a696155f---85498452841.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4962a3ce9a---womujifibisizeledoze.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/rexopimikix.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/90002737932.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/kovulofiwazozotofezesuxok.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ircnl6218lq4mm8itvcd7uc2ej/61839145017.pdfIn PDF document text
    • https://istanajp2.com/contents//files/6153801308.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_off0000ca0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0F 16280 bytes
SHA-256: dcd2170d2c4977eb02483546abaae4b208f69b24a14090183e1518b3bded0059
font_01_sfnt_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 10644 bytes
SHA-256: 7ae55bc2437fa3f23bccabb4f691e71f6406e0d3ae94ef8e896ec0094a4c8f2b

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