Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae8ea8c8c857992…

MALICIOUS

PDF

81.8 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: 7ca0a383745c9dbc02a2868bb8ca7d80 SHA-1: e7768d19ccff27c247fb5f82d742c7bafae50a67 SHA-256: 2ae8ea8c8c857992467346dc2ae743f9a6767be40fb19c7adb4ae62cf4c7d5d3
126 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 WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware delivery through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4718

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://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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