Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2eb3095b8d6f07…

MALICIOUS

PDF

113.9 KB Created: 2021-09-05 07:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 52b6614b8b2ab4ed657417c18d089ae6 SHA-1: bbbfc0a047f0ebadccdd404e32d8f008e2ca6031 SHA-256: 4b2eb3095b8d6f07ff6ac0d31178961fc17500d23076cc25af7e702867cd0418
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608796df10d77---210275712.pdf In PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-1/20210501001055382120.pdfIn PDF document text
    • http://garderoba.sk/images/_file/52723075986.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/zuvebede.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/totidalifoxiwejow.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/sefadobumiriwarado.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/vuxovakafidizojen.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7d17cbff3---fodezavibi.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097457e843b3---bivoxujajubasaruzakiribix.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a75a8be939---24344239755.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a22fd866e71---53974750851.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/b64a41d8a4a5118850fa4c4a0f6a0f5c/wodokidenezafozaj.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/b8c17f29c2d95dfddce574bccc529c62/tabakuxowisaranobuso.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/79557267141.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/37578631075.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97366320085.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c186f18a96d---67711042413.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1a4698824e6981df0b8574bf875a3a40/xomirumadexetukemu.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/96439442069.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/17244642309.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/xogajiwusejixokowiviriz.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/39418314388.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cca549c90---rozilomavekineg.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/89910268207.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a079d4f3e1---49081138834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=canon+in+d+guitar+pdf+downloadPDF 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_off00015626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15626 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E3D 10592 bytes
SHA-256: 8e46a9faf7fb49a9536d1bb69ed8fea85078e534718a7b25ae627369ab805799
font_02_sfnt_off00018660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18660 19772 bytes
SHA-256: cdf74e4356bdba88e45ac1f84722d6f001836d9762c9ed67a57b814fad4ed2c5

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