Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cc13facd336136…

MALICIOUS

PDF

90.3 KB Created: 2021-08-12 19:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 2fbc908f439fca903682025793ac7422 SHA-1: 9ccff8b8cbf668a2e344db5accc51de21f47b4ec SHA-256: e3cc13facd33613671e0dd2e3b7aef0dcfb9cf5d9248533c7c65fbd7d5348b83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm intended to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are characteristic of malicious documents designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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=how+much+is+iphone+earpod+in+nigeria PDF link annotation
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4b2995608---sanepozatexatewikikawelom.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/39398727477.pdfIn PDF document text
    • https://moolans.com/uploads/files/22812755528.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9fb60b81c---85922165485.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/zojiwidiz.pdfIn PDF document text
    • http://hephatha100.com/clients/4/45/452f9a9cd3514f90eb92b3b4734a1f1d/File/95964403919.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/tatumazikubanusipezeg.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76fc6ea64---35774434600.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/22364016522.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/3aeaf452db70421381e1e836801e5d4a/niwezesejewujekukararilux.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f27a816035---vavupezixotexezuxumiwako.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/7062020549.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/gedukulonikotoxes.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/f1nl5ck1cgu4iqfh2f7bvt42em/tikawe.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/uqu9e5a5fka7i65ljfcbm6vr22/sizerizajorudunapoten.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3c0794240---giwurutorujaku.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/257656272ba97fd6006fecedfc24224c/43710446258.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/fcaa9073e3c5f8629b6bb49bacd220f9/81748676340.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9b6506c4f375fce5208b67da7f2d7607/61935389804.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093594d0ced7---kukilomewevasupu.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/559nqeoighvlbg7u8ei474v3l0/47937845040.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/pukakutiravotoza.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/a0g5r9g900iick9aklisuhgvg1/50831998258.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/78434144531.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab97e0ba894---19559781437.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d75ec5df---zavakotivulosedixamotejej.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_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 10996 bytes
SHA-256: f404f99fad43d556a20918f6b3bbfd18ebbc244204b91730b84c384334352c9c
font_01_sfnt_off000113f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C06 17584 bytes
SHA-256: 0810e3a78f7631fc35357692a8390524582467669679877e5d69bfe2fa2cb3b6

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