Malicious PDF — malware analysis report

Static analysis result for SHA-256 e418e9b30d4d9295…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 09:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0fbea2075b44b956ad4a76b739fecd23 SHA-1: 7f4a04033309e25e66c6acc865e75da866e1f127 SHA-256: e418e9b30d4d929503e67da3a045638c3ff6743970ccda0c36c0013dca6478d1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to external content, consistent with phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://krisoc.ru/uplcv?utm_term=hack+for+drift+max+pro PDF link annotation
    • http://ilksolar.com/Images/Media/files/73845379663.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/64319244268.pdfIn PDF document text
    • https://tukangjp.com/contents/files/moziwujenozudomesuj.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/kamedazoro.pdfIn PDF document text
    • https://bawauang.com/contents/files/xugafowi.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613f88f1077d7---13832911795.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f783b6bc0a---noponadojo.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb650a0828---7077652621.pdfIn PDF document text
    • https://jss-moms.si/upload/File/85583162050.pdfIn PDF document text
    • http://rsst77.ru/upload/files/mesop.pdfIn PDF document text
    • http://state-lithium.com/upload/files/56141510424.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/43943010303.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/vigexezajodedoturopib.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/pimewedi.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mavigonaxeraropiforadegi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d5c8b6c93---14218176012.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/tibus.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/36687106232.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612fce5cefdcd---42893782350.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/zosuziz.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/belufugokuvugosawabanagaz.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130517d83009---27084875853.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/11132332342.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/buxazojusekevokem.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/q46fgn1nu3539nn2s78p5vctns/47912926276.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_off0000b085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB085 10516 bytes
SHA-256: ecc5cec91296f7169d5d47cfd1badc007b0f5eaed533e6ba5ef99c17be3f5fc7
font_01_sfnt_off0000c87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87E 15412 bytes
SHA-256: a7fc0a74746d12f2b7fad9404a5df7cd77226deb0d3a46e10be178c2ca7162c1
font_02_sfnt_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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