Malicious PDF — malware analysis report

Static analysis result for SHA-256 f152a18613affa29…

MALICIOUS

PDF

85.5 KB Created: 2021-09-01 23:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9729430c4d84c3099fedcec31f268f48 SHA-1: e3a073280a3b34d5f2aeef0bd160560653d8e8fb SHA-256: f152a18613affa293a7e654e09e4128dce475cbcebf1158cea1f735379b6a0af
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm hosted on potentially compromised WordPress sites or disposable hosting. The primary function seems to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://eventologia.com/userfiles/files/gebowup.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b65760770ed---fojipomuxopa.pdfIn PDF document text
    • https://red-adlay.com/upload/files/bavidi.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/pidebesofo.pdfIn PDF document text
    • http://foodchemsino.com/d/files/16887303002.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3badb36ee0---27466115220.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607924b188861---febuderefabitopuwobelerov.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/71553022289.pdfIn PDF document text
    • https://laps.pl/userfiles/file/xifuxos.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/tugobewuji.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lusonagomilogebesipodev.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c233f92fdd---donenixogazexiwivibobon.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/d803339507ca6c1bdbe541740cb8510f/71907356543.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/30ec0069c2e4d432a1fea1d0f00d760c/39307540007.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/djgj13cub44g0dbduu0goiudbc/3866782321.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/57873785611.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021523948544868.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/dijamupesaxokofon.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/cb3405db7fea0454a0bd9361cfd54b93/fiworigugunenoba.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c070ceda800---kabiro.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb94866720d---vijixolilenijafi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbd3c5d8d3---wujilurana.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/42661855546.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3d078585f---gunodomavu.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f21719da42---69624339922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=betrayal+in+the+city+pdfPDF 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_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 17904 bytes
SHA-256: 20db3cde667a2bdad813c4e24aafad531c213372a22d2600f3193307d9584729
font_01_sfnt_off00011736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11736 10596 bytes
SHA-256: d7c761445283b1503e0a70966789b59bf0c2f78e0abe5a1bfc973bd70aaaf978
font_02_sfnt_off00012f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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