Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01b1581bc9b58ef…

MALICIOUS

PDF

77.7 KB Created: 2021-09-04 10:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7746e7f850b564444e85fc34c9f063d1 SHA-1: 9c21b50bf84a5854c66c195d36fb3734284dd02f SHA-256: d01b1581bc9b58ef8ad891190da263d07bf664ba8cccf9eddba3ba377fe7fde1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aweibel.com/Photo/file/21553721993.pdf In PDF document text
    • http://sireny.net/share/files/93318164276.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/48c1fb5659ad8f82d5385baf9dc71630/dabesevonotirokijuj.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/74304314023.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/tezelenujunevamirekizogu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/596c4782101b5082d14bac46e97c92d8/vevejizuvepugesokigakoti.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/vulololobagefuzusedukat.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833cfee8113---vemofividepe.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a787a183b---86051882016.pdfIn PDF document text
    • http://ozari-ua.com/files/file/97737776855.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/94ndge7rvtr3dkbp3fc7u6k7o0/42378633982.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132baced959a---basewakuwi.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/35008099447.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/p587rpav55l4dvdpiu2js5lcon/kiril.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-7-20/20210720000109395120.pdfIn PDF document text
    • http://willbramephotography.com/15244891910.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/lojinix.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090d3928e570---21555517824.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c99d46f28cf---21310286084.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f542d13cb84---87876584226.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/32314062785.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/nunidagivufufukok.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/fowobilusi.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/rufase.pdfIn PDF document text
    • http://kftchem.com/upload/files/2799743657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=telugu+calendar+2018+download+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_off0000c45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC71 19616 bytes
SHA-256: cbea8c3fb44cba77a4f9f8a37b93db6eb8de129740ff6b6974410d61aff7e3c4
font_02_sfnt_off00010f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3C 11088 bytes
SHA-256: 839fe354a1b3b4ccdff47f3434d0f4711ae473a314f4e4079e7108f3168f6718