Malicious PDF — malware analysis report

Static analysis result for SHA-256 7593849e33a3a07f…

MALICIOUS

PDF

92.0 KB Created: 2021-08-14 02:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ef8cd1269e63f2203b70b6936e9373e SHA-1: 444a68026eb1786c292b08ce817d51576de6427d SHA-256: 7593849e33a3a07fb073a09c917eb5a0887e25c1dc430f5c3052588d76027a62
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links, potentially leading to client-side exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://china-engine.net/ckfinder/userfiles/files/13917407866.pdf In PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074d32d7ebcf---patuxitasokinupepi.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/17018144126.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/balogijubuxolufodazu.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/34126113237.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/pixisivojowigora.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/wixixataguni.pdfIn PDF document text
    • https://123natura.com/stockages/files/sojigem.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cb6d170b7---tazudevegikus.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160aa548896b72---fezevosotezigetasarizo.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/12u8f810r81rbp49617b2d4h59/pigugapajogavinedoweraz.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7c4168165a3c1096788b90cadb2232a7/zofutekug.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/67c10c1f423a00700d795a5a3b300b6b/pigeloz.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9521fe8f2d---21223413179.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859d7c23eed---xasidexebajilomuvekolax.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a2fc043f8---9766444726.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/zugerewiru.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/v3531hv64drt02ior96ot71124/zukotop.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/15987261455.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee00b5593a3---20080124267.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/84407912192.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/tibasibawixebilexazuw.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/kagilexusajerokoxowureme.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/jepebawusotubifovorep.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210607054635258272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=easter+vigil+exsultet+sheet+musicPDF 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_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 10704 bytes
SHA-256: 90300535ab959b183c7e3d7d59e622323b9de39221225655077e6ffd8f92160c
font_02_sfnt_off0001321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321C 18428 bytes
SHA-256: 299795c9fe9e79e6fc82a672be3b9ed1fd9b4d31ee04fb29483b37f7ac7922b2

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