Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dff16d81db4296…

MALICIOUS

PDF

84.3 KB Created: 2021-09-04 18:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17b6e9202a6c99f3d99b9de79c6af376 SHA-1: 2717832b91119cf956e37c28cd3887dc10c987af SHA-256: 06dff16d81db4296bdf02bc7f49fef44ed2c3a911370729fef6eace1305bdda3
156 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 websites or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates that the links are designed to lead users to malicious content hosted on these compromised sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://mobydick-band.de/fckdata/file/50677144686.pdf In PDF document text
    • http://studiotecniconuti.it/userfiles/files/sinatewovojiriboxek.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e43008e63---lurapumifaru.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf70b39935---57777562997.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16110115ae2cdc---74156780941.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/90704266072.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/47976636550.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/68853977277.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb6099b44---1089878627.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b13adf924f2---15398427508.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf2281cd7b---44427441497.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f52ce9fb---sapigitixo.pdfIn PDF document text
    • http://ccsl.asia/files/43594574576.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/22754001049.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/c85b054e377403b01fdd190b9cbac666/59242501046.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/86180160746.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/2728435422.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0565276928---sorusodezojis.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/nojatiximudejezem.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/mukorigajinikelejewo.pdfIn PDF document text
    • https://magerp.org/upload/files/rofaludakibunabo.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/94300726417.pdfIn PDF document text
    • http://theponghop.com/upload/files/biwutineniwurabuvulag.pdfIn PDF document text
    • http://agama-rc.com/upload/files/kuzakimomukunuzedonaw.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/cba94910cead8a8030e940e1217e4892/xigulegusezanexas.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/19457519110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=canon+eos+800d+specifications+pdfPDF link annotation
    • 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_off0000e315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE315 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 17620 bytes
SHA-256: feb7c6052277f67d850e53f5ed21fa76ed2c9e1875a26ee7240d5cefc9c186e2
font_02_sfnt_off000129b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B3 10828 bytes
SHA-256: 793bfa15f9505e73482c2be36989582ac90316166796fcf254161053278df7d6

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