Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f474c3193129182…

MALICIOUS

PDF

75.0 KB Created: 2021-09-06 09:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d65f830a1a0f05f4456a6542768c0e6 SHA-1: 1106c026b61d758c162a1ea070b59b12f1f87942 SHA-256: 6f474c3193129182f0819dec32a32e3af888d2b3af9d52bc3894e52943db26b3
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external resources, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cmuniontravel.com/userfiles/files/52462166496.pdf In PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160765f811f41d---23411218393.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/toluwu.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/rafanuv.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/74654579933.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f869fa1482.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db9a41f1b0---duxebumikelavivijinebu.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/37396859692.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/a32408eb60c1f897a827cbbbd64f4c61/52359846893.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4136810050f3d85b0e5bf9f53894e22e/xevabomiwavo.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127e1d4c5b89---lujutakipada.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/bonoxejizibu.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160a20c362b744---zisakokuludomexuv.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b48873256b---sujesivanabu.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/besavoreziwutusizogu.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/posasikikamep.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/49287188756.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/gizegurerakufawabojom.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/pexesizuxafutimopufofob.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/tamexanoxirulikidelafama.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/gofavo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797e37e02cf---80166207744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sahih+muslim+urdu+pdf+free+downloadPDF 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_off0000c216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC216 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2D 10928 bytes
SHA-256: 7348157e64a3b8efb06fa555a3965ed0d1fbdb8145950aa5efb959d09b842812
font_02_sfnt_off0000f341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF341 16764 bytes
SHA-256: 1062e3305fc15f456ac0ff63d67b3474d3f01ac241474f39010d3be755625a68

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