Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ed8f08b2ae9180…

MALICIOUS

PDF

78.6 KB Created: 2021-09-05 19:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cd940c3cf02fb9029ec9228b646d3da6 SHA-1: 9b37f60c5bac526e990fe451d786ef1006190a53 SHA-256: e8ed8f08b2ae9180eb783fa7aef1971e87eeff4f55b25c49dccc58f72b699df8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cructi.ru/uplcv?utm_term=shree+suktam+samput+path+pdf PDF link annotation
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/72966371050.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/sfg7p36cflobd6erbrkm7un2fc/59241128420.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/23725174259.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e254432fd0a---79364111795.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/xiwarovuwojexi.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9fc73c9c---wivaxowojumemiguxixu.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a1d51b5e---vogewixatajugababiw.pdfIn PDF document text
    • https://susta.vn/userfiles/file/pedanafugobofuxu.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/82759880642.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c6e5b28d0---napavunanosa.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/71969051603.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0c5da6be5---99170425939.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/51158413151.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/muxatovetipune.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d29fab08a44---36463251933.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/tudora.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/bovutofidanixoxobulidoj.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/fb4b2823006398900336086ddbf254cf/85659138978.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/veloja.pdfIn PDF document text
    • http://aimic.com/userfiles/file/xogifati.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/warone.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/37820078288.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_off0000ceee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEE 17908 bytes
SHA-256: ac485768294a319e51b4b7c6e43d00de06f2f73550175e446d77b39456317472
font_01_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 10668 bytes
SHA-256: 4528e7fa5246ce4ef65bf35e350969842f858c231d17993a2d273b06975b9598
font_02_sfnt_off00011567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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