Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d62dcc84607c59…

MALICIOUS

PDF

87.6 KB Created: 2021-07-04 15:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8192e08434a30b3a6f8ca2526f23c199 SHA-1: baf89510cfbef5a0c6080c03b0fb9ee2e6202884 SHA-256: b0d62dcc84607c59cd370bb17f4c97c1bfaf79d05506ee2ab06f3ba8c631b2c5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2e202d04e---10501113986.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/14ce23bcb2f734cfac9b6b99ffe755ca/dutizanubanojeruke.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/a3burtrdnd97mq20lj073augtf/84041866795.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ca5e8567---gibofuzekutiritosumi.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc0977210a6---filivipupomibejalor.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf4d74c2e7---81631394419.pdf
    • https://stehovani-ostrava.cz/static_pages_files/file/94721248255.pdf
    • http://hawks79.com/clients/85064/File/8905364314.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/d560533a122f2d562d4a6351beef24c4/75114725365.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/bc929c0a63dda25f47ee8c1b9b527e2c/89938197652.pdf
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/rtngrevg1nc3kfddd0aftl9tt0/sesut.pdf
    • https://tangentemag.com/img/file/kuwebosowefuzor.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c28f787b90---58211979221.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/li1348juu9h428d9l2gno6qka5/85206639635.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/85b76a4a1270c39cec8eff41543272da/vexudivixanisonelaliwug.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/05eab1831ebb6cf6a102a30ef7bfdc9b/xulokebevobevazamujakexed.pdf
    • http://giftboxvietthuy.com/upload/ck/files/xilorazuvojomegezitudore.pdf
    • http://clubesquilacoma.com/uploads/files/96898670893.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qiqi6kqtl1p7uggl7iqli78p71/fedopop.pdf
    • http://www.manorbymajor.com/userfiles/files/zavoxufa.pdf
    • http://okwecare.com/usr/userfiles/files/43618726806.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607207d18d5f8---fezixiwowavepele.pdf
    • http://cpgny.com/userfiles/files/47713227624.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=model+of+communication+with+explanation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27b.bin
e04a0bcafe327ae29a61a7d4113bd3547b5662a5189afa74f2418316fb96a089
pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 17376 bytes
font_01_sfnt_off00011fdd.bin
1a56c28099bc1ba0da9c7102a5fc9b4d231d28f0b684303994548f59154c4541
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 10896 bytes
font_02_sfnt_off000138f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138F2 16792 bytes