Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc01d6b825fc8c5…

MALICIOUS

PDF

84.3 KB Created: 2021-09-15 23:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: df162e41fa20bce67767641e2421d6da SHA-1: 13d4574ea325b0d74d0c21c713b089e3783c79bd SHA-256: 8fc01d6b825fc8c53c89b49a37b2875454b797c0285356da3bfea03f6afcacb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://ticaproduce.com/ckfinder/userfiles/files/8637791911.pdf In PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/sojeji.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/16172326594.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/37636273599.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/70134718501.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/88059193207.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/83742431228.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/bokozodemagijepavavowori.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/jexolusufutozo.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/1895265223.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/zumevubipivulak.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/19096096146.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/27938097526.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/11493653817.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/ziwowojojiwiloxapasemopo.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614089bfee4ec---tukevevilejedejepap.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/96459913831.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/kabugafabajap.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/57160658142.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/84577464868.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/sepomamakovozaremog.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gigenel.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/kezinesili.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16135e63023984---xikujisunofevovut.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/95021935717.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/1661361822.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/1c10aadddfe88e5da8ed50162733e4e9/newogugibodunejon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=barbershop+3+full+movie+freePDF 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_off0000df85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF85 10952 bytes
SHA-256: c841826989af15583d9dd37cdd215ee199f6e358f839247b831e6d42c5eedcfe
font_01_sfnt_off0000f8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D0 19924 bytes
SHA-256: e608a121f6f6041479dbd688d645d5f8bf4ce5a9b44463fe5fee07676b1e4234