Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daa4c48bf78dbd3…

MALICIOUS

PDF

84.3 KB Created: 2021-09-15 21:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ba0655f8092afcb330247c856644845 SHA-1: 391d148c5040f1cd85fa834437eee5cdca313063 SHA-256: 6daa4c48bf78dbd355a7c5cc02b7121fee14a2a86074d4b4bc3f4577ff2853f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely 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 0.9860

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://oniceh.ru/uplcv?utm_term=android+bypass+battery PDF link annotation
    • http://danies.ru/ckfinder/userfiles/files/66200642818.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135974cc0564---laxedimik.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/49460056574.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/sunalufimalefalofo.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/vemavuridalome.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/vobewunajafisu.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/62923767510.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/43913485707.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/3179261171.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/toperizufimuzofavo.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/27560194654.pdfIn PDF document text
    • http://namngonviet.com/user-/files/19246462233.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/66080650054.pdfIn PDF document text
    • https://cet.sk/res/file/53482591328.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/nivubitogekul.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/nebafaj.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/dekibesafiruwered.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/4bvu513gbljscsbs910s6v504a/9741187201.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/25796376451.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141122584cdd---nowaradosoba.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/futew.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/99529006372.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1b1d0da35ecc37eee5b6d944b8915a17/50257930625.pdfIn PDF document text
    • http://tavio.su/files/file/jejapejonobitijadufonev.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/basus.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecd2c9080a---mexaxejiziwi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 10572 bytes
SHA-256: 6b054555b0eb0d09c7d23787feec41f485e6a55fc6d9faf41fa4b44bf0248577
font_01_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 17804 bytes
SHA-256: baf7e750342335b5c31110ee6a3c3680d5488d165ccb573e458f00fe01a41c3d
font_02_sfnt_off00012bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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