Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95755468e20dc8d…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 23:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a4455ae97504c397d3d8d178ddd9539 SHA-1: a40ca084f62fa0316059010f7765ae77d576e13a SHA-256: f95755468e20dc8d3271096f0536e3444f5288f8c73bc98dbb3d5a1331aa4353
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to a link farm hosted on disposable or compromised domains, suggesting a phishing or malware distribution scheme. The PDF's structure and content indicate it is designed to redirect users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pistant.ru/uplcv?utm_term=pes+2020+hack+apk+download PDF link annotation
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/kevojoneligelugoza.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142bafc75b41---gerer.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/8202cb6d9c62b9f04c63e2db4eb474b7/95750359493.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/85692207721.pdfIn PDF document text
    • http://xn--80adib9cjd8a5e.xn--p1ai/i/upload/files/dezosikavomet.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/mowamema.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-4/20210904015456932386.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/54712340681.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/rabogejumiragavixipovo.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/kuduvokonutewemive.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/79234310999.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/jibabogadopuvodad.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/35877790393.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/turalonizo.pdfIn PDF document text
    • http://erpos.sk/data/files/75151938122.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/tojixavofase.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/72076123630.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/91379906479.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vkqs6de9r398n12ijvjjs1kq3p/kafemafiweb.pdfIn PDF document text
    • http://unsersohn.ch/images/file/45567633352.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/refaperasejadovuluwavep.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/zavikematuzizonepivuxe.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_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 18020 bytes
SHA-256: c1527b5866a30eab68280d76cacfe6b39f1f9fecf9f3d5961d52ae9f61b5b15a
font_01_sfnt_off0001053c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 10740 bytes
SHA-256: 7677531afbf5f2fc8a4429425f6006e43b37fdd04a2d208ef2e266b3078edd98