Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7deaa0891af9a1…

MALICIOUS

PDF

87.0 KB Created: 2021-09-23 21:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2ce1f965b760aa17bf4bbd2c32bb1781 SHA-1: 534a0d40df783cc842d4cc59a315d00b022b8c2d SHA-256: 9d7deaa0891af9a11292040c2ba263ca61af9022b3d3e8f4660233c92ac5cf77
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://szm.hu/userfiles/file/bipuliwokusuwesezepe.pdf In PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/67409824556.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a775e759c---jokitik.pdfIn PDF document text
    • https://chp-travel.ir/data/file/nesovabojuweroramozaga.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/kemoxitejajujuveju.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/9f5c0c270b83ec9800983a19efb6f6cc/jexorotudoruminasebawuwil.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/nk53umopnnn5iiu393muen6r9i/97301236415.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/gufadetubesudesumep.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/ruwiladisi.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/fazuxitufaninagirag.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/8276245c16cddf7dd7d7f56ec3499b86/pekekuwojibab.pdfIn PDF document text
    • http://gilbertems.com/videos/file/31621565711.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9f84acfe2---komikegefulig.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/7742760478.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/983871542.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/xajamisaxogakolevud.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/xaduwobipofilaperulogufi.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/33184270171.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c3c163840---53379753134.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/xajomubumezo.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/vejafesakagit.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/67962817861.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/47594231949.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1614425376fc78---90172996466.pdfIn PDF document text
    • http://artemon.nl/userfiles/file/xivigujedowozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=truecaller+gold+2021PDF 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_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 17748 bytes
SHA-256: df1c66819c971a73158cd0872f9cae42bc3c94adbc6110bd259a57214ebe3a54
font_01_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001351a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351A 10440 bytes
SHA-256: fd1478f29ca4e39e148f921172232a92cf3868b85576fabf4a8aba5a25056111

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