Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb4d6a3d0e21e9a…

MALICIOUS

PDF

72.2 KB Created: 2021-09-18 20:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 16d51af98e6773a58aa98ad60b8d6b23 SHA-1: 2a71654b9de3242961456ff4fa156882821f9d24 SHA-256: 1cb4d6a3d0e21e9ac6ace05f2ec928853087cf9477f4b7cfebc69cbfce035a80
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, indicating a phishing or scam attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external content, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ebooksweb.net/files/file/99093049906.pdf In PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142195ab0b23---vaxudopimaxek.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ed19e4657201f00fc54f679c668c19d4/taxamuzevifazaribase.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/24566318631.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/susubemebuleludozamuzo.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/20912971284.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/dugowajazipumiz.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/59184274398.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/19518554967.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/2082910102.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f786252063---makokoxeresuleduvediseput.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/88209757272.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/82058841352.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/91498330758.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/fisowok.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bogajere.pdfIn PDF document text
    • http://elitvorota.ru/f/file/zesivonapijokunudoki.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161305eb4f27fa---48195657510.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f3b52efaf---fimuvite.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/wepazeno.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/renedubotitagovuvigekusu.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/60878075184.pdfIn PDF document text
    • http://yuha.be/_files/file/99726045479.pdfIn PDF document text
    • https://cooperadora.grupocreartel.com/documentos/archivos/nalafev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+spongebob+squarepants+movie+full+movie+hd+freePDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/25741292853.pdfIn PDF document text
    • 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_off0000b8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EE 11360 bytes
SHA-256: 9a237e7520c4a95faf62254b6b761120349d5675a174d3077af4dd9621fcf43e
font_02_sfnt_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 15888 bytes
SHA-256: 51cb40acc534a0f612fd449097bafbf2818e570dcb19bd6e21e0bae091c76a41

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