Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e15384714c6f62d…

MALICIOUS

PDF

75.3 KB Created: 2021-07-22 07:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4077f1f8ea567ad2585942cd9c558bee SHA-1: 6d9a8d1a473aed4933862e28ab3b420ee3cfe2e8 SHA-256: 6e15384714c6f62d4aa2f023cea04272c5fc1e181a5079a3a89d9c467a5c161c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point towards a common tactic of using documents as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/zodevutu.pdf In PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/4f5c9d36a50ea0b21afefdc98ee61c2e/7275321486.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/69897802346.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/42117986550.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b3a109b1---82017950277.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/2663500368.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/f91a482a574ca4ab53bd2cce11e0426c/gudunilapegilozozifofav.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8aa03214fcd2dc08ad2b4366c63e75c9/tozibowokenos.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/kewobolokokab.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/movurewis.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106301532062133.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608835ee12605---miwukodajo.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/s8i1v7pqpidr41qd8hlm51uuac/xowetimi.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105201900484457.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//73140595833.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/4eadc2cb7712a7227c93401d5a1e7ceb/47517395848.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a88e4b3b61a---ponitigaxedipifugapozos.pdfIn PDF document text
    • https://ubranni.com/uploader/files/zafaxamefox.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/qcgsf8ctu8veevrqdnf1o553et/59854778470.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/62501785605.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/8oh706pa4oom0tb4pdogvnu307/gelapugurololexaran.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/8540779bd51e9cac0ad7aaa4164df814/43667315889.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a55a4fdd4---63468964927.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bacd7f373---95905318236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=consumer+behaviour+by+schiffman+and+kanuk+pdfPDF 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_off0000c428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC428 15592 bytes
SHA-256: 99662a1152fa9df5f9b2900d224dcc9452ef2bb0323f3f5c36998f9ee4303419
font_01_sfnt_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10435 11284 bytes
SHA-256: b4391dc61e8c2e1b1f86ab17f29d563510105be3087b5e75a9aea22a55c3fe58

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