Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60fb3d3d962c4dd…

MALICIOUS

PDF

90.3 KB Created: 2021-07-04 12:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: aac3c7af21f77bd3e9538187a1d496ed SHA-1: 7f08d503756d05dc59a3af929f8e535894eecee7 SHA-256: b60fb3d3d962c4dd2d9a42adc89c7f817de0661574e66761428e80f6eede5846
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://coretry.ru/uplcv?utm_term=outriders+best+technomancer+build PDF link annotation
    • https://www.avantagesapp.com/uploads/files/pisufefubuzoja.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be51298f988---96822498342.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/vim4laoru8kqi1366nmscl0r5r/94526808450.pdfIn PDF document text
    • https://pellevah.com/upload/files/91235257264.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/dada173e4af177c95a900f37549dfc92/gafupirukabawetetob.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/4dobm7hlrmf5mrihance2lu717/12913352929.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/zusawesel.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/97151497c78dfae5fee3df87c92382e3/vowetepeku.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/pogerefopevasofike.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/jcamkooj17vn2lt4qoeuhce822/simafagobatelixaje.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071e5b0a9d08---polabuzizesagigofagutebov.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a47968ad0---2139227630.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8fbec7aa2---dekavafowozopulodora.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/7794e97d5c8af6308f92ddc898a3e7ba/58700390824.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160982efb79d19---69487033073.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d09df606b3f4e4881ec197859b65e7ba/kudikadojamexuw.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/45dfda7ce638c22ff01b5e680cb9d4f6/dunusosa.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8cd89bd2b---xuwedufozusajitugi.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/39628387849.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/11190143263.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/81237713868.pdfIn PDF document text
    • http://armanetti.com/images/97027898097.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee9d51a5cd---8107128559.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/80428364126.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_off0000fd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 10900 bytes
SHA-256: 6c8b4b5fb4138b3a68f8d7d076d219625d4c7d914c5fb9779c4ebec1565b54f2
font_01_sfnt_off00011662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11662 17436 bytes
SHA-256: 0eb2a0de7eb5b81614ed05e6f200d1c5d25c0ca63419429e7ceb705fe22c3d4d
font_02_sfnt_off000143d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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