Malicious PDF — malware analysis report

Static analysis result for SHA-256 01adf3f104e49bed…

MALICIOUS

PDF

94.2 KB Created: 2021-07-03 03:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: c7bb230109337d46ae9e4b90491d6ff1 SHA-1: 2adc1c6284f476dbfc6de14b0379a9b1efea29fe SHA-256: 01adf3f104e49bed5ae3d371a184979757f17f1288a5f260514545144d72f59d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing pages or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed for initial access via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://huntic.ru/uplcv?utm_term=formula+of+density+in+ideal+gas+law PDF link annotation
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608eacaf70dea---72459182553.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/024180aabc16a3e87d0fffbddc5db9a2/28023097166.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079de50109aa---xabibunofijanipiluxef.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/11672213674.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/f46b0ed2a8c71f6066e44afa5bd6d9a0/72124153216.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66da0ab606---33734732880.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f668618762---85730427666.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/bifetanijewujonawi.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/c4ee52cc91cea664a859b7549bafc9ff/mulubajadabatu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c586778cc68---2514745816.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/37809057484.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/tvicv70g18o322vapo2u6osld8/lajababulogedukemojise.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/708256446.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210613081431.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/68567292561.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/ec7a9e560c6987744ffbdb35dbf8a459/nixobifimefaja.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d82e219e1dfefada1120d1cd94d86693/xoxiwabififanofobajebulep.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d64b596a5e---puluzufemekow.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/76785797892.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884e98d6490---34851690528.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/jqdgdo6icokejp55if74aso5na/pefujezololufofi.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/74769500871.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d9be6210a1490905d8ee8a8cc4a5fb98/56677062909.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/160c4cd711a5d3168c15423bfe7718f7/42001218576.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001093e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 10972 bytes
SHA-256: 88b1b60434e4dff3f05e7c796855554750809966db73de6b0b508b90c1a155b3
font_02_sfnt_off00013aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA1 18260 bytes
SHA-256: 002aad8a8d9bf60813c9d165469f12ef9ec64396c654b56d72904e525c2c2733

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