Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed8d845fb80b586…

MALICIOUS

PDF

80.2 KB Created: 2021-09-02 01:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 781176d1f855fa60d8a6927f1346e1a2 SHA-1: a1f50b0fbc45e847baff343dce94765455e79be7 SHA-256: 0ed8d845fb80b5862d145e08b768fc61c39ada659cd474cbf117aca449bb3b29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for malicious purposes such as credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://creteotels.gr/FCKeditor/userimages/file/tirojatege.pdf In PDF document text
    • http://fittbikese.hu/files/file/74107821462.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c9e894847643f93903bdb18c5855e984/lusisafibegiv.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/9142090650.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d51995ff4---zefapaxidewutelagug.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/82648634618.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/kurivenomerikulivipofu.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a584540d4---niduzidor.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a64a976c887e3cab855652ab33b9138b/zuminodabil.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/safunagojufidefafise.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/47999673379.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/razixafivi.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/m96sjqkha0ve82dm12kdn7obm2/gadafununogigupod.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/kilirowe.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/40895599261.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/purebefufol.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021062300324780.pdfIn PDF document text
    • http://akademibt.com/resimler/files/78619186386.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160921dcd6ba80---zaxutag.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/25652178228.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/jisozakokisox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+lady+of+my+life+michael+jacksonPDF 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_off0000cfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA1 10844 bytes
SHA-256: dcb39d1008814da542d9d9916f5be2b0b9bed4f30ebdbaca9afbfebad55a8e94
font_01_sfnt_off0000e869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 19284 bytes
SHA-256: 0677d551feaf0726eafb52d1cdb0e9659db6517bebf49ea80a3c15c92f1dc1d7