Malicious PDF — malware analysis report

Static analysis result for SHA-256 44924cbf04c43395…

MALICIOUS

PDF

100.1 KB Created: 2021-06-20 12:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bc82ec6e306252267616df8a4e2251cb SHA-1: 317f25d6b14716628e04c42552a98c8563a60e39 SHA-256: 44924cbf04c4339527c517d85c6e7456e107c6019dea2c4a0679aeb745debcfd
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Roblox fonts' and the authoring application, which are likely lures to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/4c331bb8e6a167ff29676fe5abb1420d/43284781852.pdf In PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160883408c3c35---nozinawezewiw.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/26d655e09c8efc6a893a617df3a54a1c/latawixi.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb1f080b4a---vakafivakigivekovale.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae3a092500---77754599658.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081562d3229a---25129867153.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6tksq0grrg5vnjt9690uq9gk7f/35189889419.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/6a6604947c313ad663a739470b85dd86/kofeludasudewojalibune.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8fa8ae549---fikiseloxepesekutadova.pdfIn PDF document text
    • https://tangentemag.com/img/file/8367009050.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16084f005bfd65---lovurudijilavomerapupox.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/97140738263.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/bkamfke79eaistl4slblbs20ne/suduporavibetire.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/37ccbd03483d2b6c656fd07d02e28caf/xufumobogofij.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/vanawisutuvewipixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=roblox+fonts+copy+and+pastePDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB79 11384 bytes
SHA-256: 725ad39f2b530f65f1727eed0f22b1ba5ac2c4460ae283251f39baa1fb2f4039
font_01_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 4872 bytes
SHA-256: 1cef40c570d260271ff5c2fe6610fae82e3ae88b5d5dad587ad876445c39928a
font_02_sfnt_off00010a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 5372 bytes
SHA-256: cb2981cf463aa54a4a6b213d500a327b8dd3875aa916ae1227b72f853726fb1e
font_03_sfnt_off00011ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 2484 bytes
SHA-256: 71d489ca799b404f92f1f265c0ad790831edaee34d417a17e5a0bcd97902c65b
font_04_sfnt_off00012782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12782 12056 bytes
SHA-256: ce13396c7055fa86db1f7cd72265cf2c45f66e25a724b2e76a9e8e31f0b468fb
font_05_sfnt_off000150f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F3 18940 bytes
SHA-256: 6e406bb3b9e335e4a22247c43f1babb4659e4438a630700d1e8c05202fc8b329
font_06_sfnt_off00017044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17044 6336 bytes
SHA-256: 83f993402bc5e5c8cfebdae5f353aee3c7307c5c9f32342a73d899447f2a86ee

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