Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da21ec0f91b5687…

MALICIOUS

PDF

79.8 KB Created: 2021-08-14 11:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7bc610e984324a490ef08384a740c11f SHA-1: 1c834e56b17f380a3c40651a4a075063e8b7df2b SHA-256: 0da21ec0f91b56874e00b7de3c8b8dc0f65109b6dba9a4d2c5cbe1d225e4ba15
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on disposable or compromised CMS upload storage. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of distributing links across potentially untrustworthy sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://scoutpate.com/userfiles/file/givagimagawaxanuvukis.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4h9en5u477e6rth3d9ejp9n526/migefizipuk.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/04e39c8afdce73949ac9bad9cbc06565/34175832155.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a48948cbc2b---2378789494.pdfIn PDF document text
    • http://c-amc.com/upload/files/dovinenonevor.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/vobuwiwebojazumubo.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/16567695925.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/17347973866.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/konufafuluxavi.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/gososuluwemomopemamanune.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/gufovizosodivafukiti.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083c65b03d08---18723701816.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/jijojuku.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/26012123399.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/63840121624.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/jibavasegetegubeje.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7f790f0ad---mejijigogobirepepop.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b3a139e24af5ce2dea50dbb372688c33/dipiruverovibidilegof.pdfIn PDF document text
    • http://sushi-belovo.ru/files/xudozudo.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/193636ac8ab63cdd8355001d22f69a66/kevevar.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/wukijed.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8998ab9dfb---gisukakarujowixuba.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/wonekoxadolotiximurokib.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/aed58120bb75fe01630caf1e808b7888/kanurazinigonifepituro.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/159d6684277e74009cb419c9ad64f4a0/80422369100.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/43177728894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=murder+mystery+dinner+train+michiganPDF 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_off0000d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B0 10856 bytes
SHA-256: b41c43b69127dae0d1a3365a2a6b9cfc03fcc39f75c5c9065b2557f10dcaea1c
font_01_sfnt_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001017f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 17208 bytes
SHA-256: 1788af0d142cbf50769201324fc605fa8ef60654a0c9bf456db094b623d02b23

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