Malicious PDF — malware analysis report

Static analysis result for SHA-256 e656f4f63b945924…

MALICIOUS

PDF

81.6 KB Created: 2021-09-21 07:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 918338786fa53e052e7537817920c4bd SHA-1: 27b5a162774e29396952c9b7631e0d8ac7f8bee3 SHA-256: e656f4f63b945924ea61e9bb45ead8a25e30aec31b0fc4a53d5712d104883b8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=gta+img+tool+apk PDF link annotation
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210913_D7F26755D2B5E97A.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ovl4plsih6n99aek8en0gss2n2/ligomowewi.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b133347760---jopawasipowefawezekeku.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202194145583846.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161312548bda09---60827072052.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/nebafilatixivetipolovuz.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/27276631753.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/jorutegika.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/lamawelasefen.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/66563246243.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/91307206901.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/laxuwiwunirovifodelipu.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/39075990217.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/tirubezivuti.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/waxalopupakugixi.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/24333945817.pdfIn PDF document text
    • http://ruihuitax.com/files/file/75618716835.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/pibajekupimubezuvubu.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8dd65aa96c676d4639ffe835b92ae40e/89633673453.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/tazawupezusijewizatuki.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/84260003204.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/53454264603.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e4bad249587e248233e604c20a1ff8b5/gasanapuvogotepavam.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_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 18840 bytes
SHA-256: 0db9f9f7053385aac519b10c1be65af83801dbdd00792af343c0591f81a49606
font_02_sfnt_off00012248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12248 10224 bytes
SHA-256: 228e1664cd1108147ed09733d2d8c89fbea81f71406415e97e1826fc5bffc8cd