Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2444c512dcc429…

MALICIOUS

PDF

74.1 KB Created: 2021-09-18 09:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3f2121cc82ac8872f86e824674de1fd6 SHA-1: 19102282a5bf7709eaca3ebd8f2590909c3f86ba SHA-256: 0c2444c512dcc429a81cde3cfb356e6bbb0e56d5d458dd447cc3f3a34a562b45
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of directing users to potentially malicious or deceptive content. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure strongly suggest an attempt to redirect users for malicious purposes, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://washlounge.in/ckfinder/userfiles/files/52752760700.pdf In PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/7kiu4t6m6d3k77quuji7p41p96/1368649436.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/sunuvupotar.pdfPDF link annotation
    • http://fratellilongoni.com/userfiles/files/menawip.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16136ce82c5b87---bidilazo.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/62886271685.pdfIn PDF document text
    • https://turbooto.vn/upload/files/nubusukenofenekixu.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/wetobigavaguvopinatuzifag.pdfIn PDF document text
    • http://topp.pl/_topp/file/kewukitifimujig.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/h3an9co231e69lmceuidi3evs1/51967814891.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/bojugebopegozigi.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/firelabafalulabikufu.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/2196178233.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161415bcf7a65a---94636206482.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0334561001631819527.pdfIn PDF document text
    • https://ikansambel.com/contents/files/loxebunixufunalabugiku.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/88jblaks2c110e9v4gtf2ls7g4/6335372677.pdfIn PDF document text
    • http://onelove.cz/file/kebokisuru.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/wuriju.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/fezolukasiwosem.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/51555466697.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/12972232072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=10.2+graphing+square+root+functionsPDF 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_off0000bd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD42 11220 bytes
SHA-256: 6ea2d2e175829a8b04d99724e00d3304d29309af891c2157dac002f29222f7c7
font_01_sfnt_off0000d744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD744 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 16740 bytes
SHA-256: f8d40435e42db98fec36a814793187d8ee9d34ff967a0d327c3ad0bdbac5d5ae

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