Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b04b03299c077f9…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 09:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2cf6970d343f7c15fe6a1574038114b6 SHA-1: 55cb02b691aa925d4215f56fc247be55ec47ce79 SHA-256: 0b04b03299c077f942dd8af0edc5497b507841ffa8b1029d3c31477e7406a924
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of these links and the overall structure indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://webtechnocrats.com/upload/file/pizizokuk.pdf In PDF document text
    • http://newo.ru/files/files/ledajebamifisarirexowimi.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088921b172df---demimosijifajelowokidafo.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/3219197516.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210806160753894382agux23opgngt.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/28457717882.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f843a0b26a---ketojigazorono.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/tewuzudalazuv.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/sagijalozivorekivez.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/rilalewipibojamanezi.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/ihfmlpr1dsq2b5t2i6n2rd1eni/wavewakegexa.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/korotuvaf.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/95461874846.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160820d016a55d---81303680301.pdfIn PDF document text
    • http://17njl.com/userfiles/files/46504509613.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/8ee04cf307c7983a512a0eba31f84cb7/87753490527.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/4jcpevl6re6el8uqe47mg7q45u/gesenisupapabijewumis.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/37270258387.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/51500094419.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/25701402287.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/danewujep.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/88841470359.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/640cca2f8ffa798586299f657fb6527c/91995833056.pdfIn PDF document text
    • http://pololanna.com/user_img/files/64676240534.pdfIn PDF document text
    • https://codecs.ro/images/file/vifawomanulesedeka.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/66101769284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=undang+undang+perbankan+syariah+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_off0000d523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD523 10968 bytes
SHA-256: 0f0007184c8e41c18eec18e2e057537c7a5a746d3b75ce917b00089974527094
font_01_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 17084 bytes
SHA-256: b9c35e52d53b29a35d2676470d07c7a9162e55614bff57b59719f5c00a24034c
font_02_sfnt_off00011a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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