Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01369bb2f4d2702…

MALICIOUS

PDF

98.4 KB Created: 2021-07-28 06:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0ede2c41c7e8fe59736eb41807a1831 SHA-1: 33538e2248f342ffa492190084fe5a082ac484e2 SHA-256: c01369bb2f4d27021362a13c03375c95d5f0a67639568b37623a56dbae47f493
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a deliberate attempt to create a link farm on potentially malicious or compromised infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware via these links.

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 http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb5aa2b647---xunabap.pdf In PDF document text
    • http://trickorsuite.com/clients/5/5d/5d84d12f6f4dfd10bbe5497c884a5f3e/File/gezevofo.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/kukisakuwujikedirezor.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/44763111347.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dce78f36e89---wavitorigezekilorabitabi.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/75106864018.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/bovdp54u6b7q5llojasclgb8ta/posazonipugimuw.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/11195684952.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bde17882e7c---xojawonugunagiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9588ec5cf4---kugonite.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/fitonawumanovupesapepanev.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb8b43c75c---botiwenaridaxil.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/df6ce801f84786f8ca8b76dc326e6e6b/barepaxiza.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba64892905e---bokagosam.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/edh44janatvgk790im9h4s9s90/38734026700.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd1a846655---pusuv.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/8773887013.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/kphd402qnt13ku49cgog9dqs5s/15589897822.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/11660082869.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93a64cc019---68053864494.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078af8b08098---sesojelalesuli.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/452ec894f2dbb2cb5b82cc8383e3ea84/87352018226.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/97380191815.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6a0b01f1---94929987033.pdfIn PDF document text
    • http://terminsk.by/pics/files/91048856076.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=discuss+the+salient+features+of+unix+operating+systemPDF 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_off00011911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11911 17456 bytes
SHA-256: f3b02bfe4733b1e8f3c0ed1e95b267133300a036b6a6d98f0a35f34e5f863100
font_01_sfnt_off00014707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F1E 11244 bytes
SHA-256: 469efb9e90803ec36eba041b3acc10ae6b491f5c6442a50e9006b8efbd7bb7c5

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