Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e0620aebb51c26…

MALICIOUS

PDF

69.4 KB Created: 2021-09-09 00:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4f3400fbdf4c571903cc1a8af72fc5cb SHA-1: 3e7db07417505c01c6c6f75f759d72397cbfcaab SHA-256: 01e0620aebb51c26e3393a3177a6c7f38d151e8bb77222dfb530909a298aea13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, suggesting an attempt to leverage these sites for malicious redirection. No scripts were extracted, but the document structure itself is designed to lead users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://pixomot.ru/uplcv?utm_term=cast+mobile+on+laptop PDF link annotation
    • https://thehouseproduction.net/file/wugif.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/46263333489.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/rumuwema.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/46025178145.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613926fa38df9---35616468278.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/faboxajeludonodijidil.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/jeteligixelubug.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/14259383972.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210903074922.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/38705268702.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/birowutut.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/wanal.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/8322329416.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16135f08fda403---vivibigepabid.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/zugoxisisafajisuwikepak.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/vulixawo.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/mitevusebofelarerasoj.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138ddf0aaaab---pobigekunupofipe.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/purexawukelijujifato.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/41336897766.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/48222861767.pdfIn PDF document text
    • http://zuche0551.com/upload/file/41656295919.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210909051439.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/33179803281.pdfIn PDF document text
    • 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_off0000b475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB475 10484 bytes
SHA-256: 496c66ed7c4518df8953f087e57b54db5074dbfb54a16c27769af135f5145106
font_01_sfnt_off0000cc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 14400 bytes
SHA-256: e55c25487e6fe7e7052e77cc806bbad0b37c74199660babfda224f2929b4ed25

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