Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dde943e886a426…

MALICIOUS

PDF

88.4 KB Created: 2021-07-27 14:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 26585a57ed411c907a42e5e5db3029b4 SHA-1: 588bbe05f6440e81fd3782085272e882a11455bc SHA-256: 45dde943e886a4265a52d249e244bfda9f4b76c21af503672afe16ed0386107b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ladangmimpi2.com/contents//files/72817236201.pdf In PDF document text
    • https://windsbs.biz/files/file/64787805132.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c991549d6aa---67988041895.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/48958472296.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff134552b2---puvitubasopigan.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/lukilivu.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/34784131631.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aafe12da71---kasogoxikokovavajimom.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/sogep.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/bqoc4eos8pnci2a2rgtkpt7s5d/78740644578.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/jurusixut.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/74756218774.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/a6c90e182b220454903b899761f8340e/2693850523.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cb4a27071---zuzipeviwuzovu.pdfIn PDF document text
    • https://chp-travel.ir/data/file/podavilibosawumo.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8af498ef48a73f8ea1db6eede81337b8/lufokifadixubukunisa.pdfIn PDF document text
    • http://elm3rad.comfile/611999451.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/38944613852.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/96121984229.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/42880212005.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c748aeba4da7b067c23666ea9e313aa/76256617603.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/83559902373.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/sogup.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b231d92525d---86586874703.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/96287125399.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/xoveseropeli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+plant+paradox+cookbook+pdf+free+downloadPDF 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_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 10840 bytes
SHA-256: 63cec35cc3c458fccdec05ed26c439eb934e20a7037e71ab0e1f86eb43d8fc85
font_01_sfnt_off00010b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9A 17544 bytes
SHA-256: a871efd88d83e23f446e57fd1a866a7ead673d0d2954681b60bb8d232b311e81
font_02_sfnt_off00013938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13938 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1