Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a773d15667a995c…

MALICIOUS

PDF

81.5 KB Created: 2021-09-16 00:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8f1a4ada0888af704f1e4863b205c599 SHA-1: 43f24c5067bcc4af653ae2b8d87c6d151cc009e5 SHA-256: 9a773d15667a995ceb776ae32c066057110f9d022ad6c15ab9dff4667fae7f8a
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting domains. Heuristics indicate this is a link farm designed to direct users to external sites, a common tactic for phishing or malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

Heuristics 5

  • 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
  • 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://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0a0487ba2d173f5257f3c816cec2ed4a/67019229238.pdf In PDF document text
    • http://nuuts.mn/uploads/assets/pikonebutofimazofajazap.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/33718475764.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/31468842190.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/43494941100.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/gavokofuzu.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/wiridu.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/xebopebavajoduxaz.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/mepup.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/gelomagativipuxadamud.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/73524709655.pdfIn PDF document text
    • https://polytex.de/sites/default/files/josabuvuga.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/lapawef.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/12917145498.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/49617966184.pdfIn PDF document text
    • http://guowangcable.com/d/files/tapixigomezideritosi.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/bidisiw.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/2162477618.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/40804868120.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/16739581476.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370b6b2ebd1---fazegapivo.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/10957196625.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d163e60813dae85cef24b54d15aec463/78683978149.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/fezofijede.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/barodevawoledadubamasisok.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/zuxoxijatukanuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=pubg+obb+download+linkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001152e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152E 17536 bytes
SHA-256: 19a82ded63745885651b0917a309a409846fa495ad714cb4b67d3208cbd02571