Malicious PDF — malware analysis report

Static analysis result for SHA-256 f177d48f9d61671f…

MALICIOUS

PDF

168.2 KB Created: 2021-09-06 10:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 08158f7ace36900fce5d7177f1e43924 SHA-1: 03f58714672210d6d78fa36508043e7d4b4b0f79 SHA-256: f177d48f9d61671f83cb0e03817b87bd08308db8611ee409151c141ddf214140
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://mjsolankifoundation.com/fck/imagesfile/57857244011.pdf In PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/48024560017.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/xifititimepaxujize.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///lezegitojefefaku.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/lubes.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/fdff705afecc3251d62252589a464a86/tivasanefugunebiwuf.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/zuzidagoxowudepowaluwabiv.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d9fa6f3ad---48617054726.pdfIn PDF document text
    • http://beiks.info/public/file/6910255966.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c42c61c2850110b94dc547077766bc97/xoponogoposerenezuziliwa.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/98305354636.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608efd075fe84---vibus.pdfIn PDF document text
    • https://irantruck.ir/data/file/maluvu.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e68d2704f5---wepuwadamupopat.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/91867329901.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/75859855147.pdfIn PDF document text
    • http://feast.to/upd_file/75825286399.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/56728903877.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/6f6923a03942e819f4fa371a48d8656c/pedul.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/bozitati.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/kilotizesunivazesika.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/1c2704d6cacfac01c8fd97fed44c9797/bedaxodelofufawevubibawan.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/22881583517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=forbes+marshall+flow+meter+8700+manualPDF 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_off00022811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22811 21924 bytes
SHA-256: 9fdcbd9d904a0072a759437ae651757d9b171b3d83579a8c849de56585eeebec
font_01_sfnt_off00026078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26078 11072 bytes
SHA-256: 65a2a5c81aadf7cbdf9bc30eb0c1add14aa8c5f69896f6ba13f2cfd27156f63a
font_02_sfnt_off00027a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27A34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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