Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80399f946fbd032…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 15:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 66ad6ed22fb01abc27f3a5232e498ae3 SHA-1: e5380c9f6bf24291a91c4c10abd91bbab95506ca SHA-256: c80399f946fbd032da5e93f36b789fb5fa960693abcba5357b3bdc79d35240bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure point towards an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://laborke.ru/uplcv?utm_term=drugs+in+anesthesia+and+intensive+care+pdf PDF link annotation
    • http://kielcenoca.pl/files/file/kebupuvisuravimoxep.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/pexitivoxuxoxefu.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/bosis.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d957ab1f8a1---90331501576.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6ab744abdcea2c0edcbeccb14c8be9b/26876984706.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088362e75ea4---tofinadutimakomapirafof.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab413c9ce---loferuvifajokiluzo.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/f97b23849b342135a7551168761e7220/38178336090.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/87240504212.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f606fd454c---41224125240.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/b7ae2361f24eaa01d162937391b60e66/sugavigupigen.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/755846215.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/forenogasigexujud.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160dac2919f54e---kidarogoxezimadezojad.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/1949ed40adeb2a3a307254cf9d3e1639/tixapesexu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/abe407cdb1f088bf99646de9da1de415/57731399184.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210703_C616EE2A0B9327DB.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///55160854895.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160810f3e3eb80---kilawubawepi.pdfIn PDF document text
    • http://amajyuku.com/files/files/38278350688.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160929054b22db---femubalagorigijeludip.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/oinfqjpnk5gu3fdo314pf5p431/wiwovivuji.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_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 10900 bytes
SHA-256: 4467cc9d4e00fad6ad4f3b17ab18d7f57478f9d0c9af3c86879fcef0a6805f92
font_01_sfnt_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 17304 bytes
SHA-256: 8957be728f1352538f2204b77799584426dcb12e47ac0d61260439dbc285e46e
font_02_sfnt_off00012bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.