Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d5cc7eb40b26cb…

MALICIOUS

PDF

85.8 KB Created: 2021-06-28 05:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e5fd40a8bdd4380f8a455788625d39bc SHA-1: 263a18d234e914a67a9446bb5375fe22d66262b6 SHA-256: 01d5cc7eb40b26cb37bf5e361c8a52fce7345904ee8f7c6db89e331846538107
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://esoftland.com/userfiles/file/43523850057.pdf In PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/p5m34m71nm4b4mgigmd2mnojo4/tetutuvarodefagok.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d2404ae39c1---livasota.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ca3cafeb8ef064108770364885276efe/3605404211.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087584586fcd---65061526.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3933b27be5---44582925729.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070542e7aab9---pokiwede.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/jupiduzuluguga.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/xuwired.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/15220518464.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/k57vgeaad69lmaktfehs5ajog6/vofowuxowotajariguzakara.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160943fbbdad36---widonidixudezojifozelaw.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb7325e8d8---regofod.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/bemimerivigawarirokilola.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/248cbc849ea894df4386ace3285f876d/36720427953.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/gudef.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/53418dd6ad9645be652b49217e942571/jiriloponufur.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/39404634000.pdfIn PDF document text
    • https://isleo.com/i_photos/file/kidizofir.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/m73vjkdug78oj3dob5t9dv7ghn/lamagugubefemogosanar.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccfb171afd---lijavaxikomimamuzopam.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08660de8a2---telipepoz.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/98619660059.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b076b2150e7---71135099507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=example+of+patrilinealPDF 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_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 10436 bytes
SHA-256: 0034d858694a2b5d170cefe3130a3388140c94fbd751c4c50b2790509f674c5f
font_01_sfnt_off00010614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 16976 bytes
SHA-256: ee030016a934b3902b307e9141040eaf4fb906d05e7b1ebaf9e0f4114b1f4b86
font_02_sfnt_off00013213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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