Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48f9fb6c66d8093…

MALICIOUS

PDF

94.9 KB Created: 2021-08-09 04:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8033f2dac3a20fda9c46116a92345007 SHA-1: 7ed8b3dd0bb0d3bc75750d004dc5d9e1bf3b73c0 SHA-256: d48f9fb6c66d80930cdd13d88f1a7e3c452275003220f205534536f9aee9d096
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to trick users into downloading further malicious content. The presence of a 'download button' heuristic further supports this phishing-like lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://travelshops.pl/userfiles/file/28571435623.pdf In PDF document text
    • http://hanleyresources.com/images/40400317260.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/junivisipakonuwozedadu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2cb008433320ad3b60c18a3700325f50/xixijazapude.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/sigebufafasanazibarulalu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16102dd4cbccfa---85133489238.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ufp8ms8l27lj095b9df6t4ffgg/33494183983.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bbe379fca---1413240252.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609074f2dbbbc---41348676929.pdfIn PDF document text
    • https://webmenuplus.com/images/file/gonijemojave.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/d9d1b3382e350ac08c4c87271987a8f7/61319863202.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/2e6bimer16se2ieftr1cqg5f34/sumalakonegidenagonaberul.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/vawivafonarirafa.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa6793881---zekuri.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/96572297695.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/52846407331.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d8d7eba84---refenigutotov.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/wefevavofumolob.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/81185301017.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b373a0a8fa51966f204f771dc7598fff/degesimipadi.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/66073640476.pdfIn PDF document text
    • https://tavio.ru/files/file/rujafibufubifakesobivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=reading+comprehension+present+simple+and+continuous+exercisesPDF 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_off00010c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 18808 bytes
SHA-256: 1a5e64d9002aa4010d7373806b23ed7d614d9f591a7f6307938af502a3e894b6
font_01_sfnt_off00013bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000153de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DE 11208 bytes
SHA-256: 99de6345bd2276d4c96459b697e6f370ae36e90224887076b5fa5027b5cf594f

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