Malicious PDF — malware analysis report

Static analysis result for SHA-256 57064d7452ad6453…

MALICIOUS

PDF

110.3 KB Created: 2021-07-15 22:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c1aa7ba1405e52e9d571a249e9692589 SHA-1: 27b921d417a179b2d2d614890dc5cc051ce521e1 SHA-256: 57064d7452ad6453e9ea213f87488879caab33fb93ee0cb13afdc7045bd5d6f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL findings point towards a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://royal-art.pl/uploads/userfiles/files/situvesaziruwugonor.pdf In PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/0e605c9386479d754d7d034c0c669989/dobowenapipapururudu.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/76sohjtl8h44t9o31nu8vo9gqe/98324111099.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/56709650318.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/jagomamuwakofekedujiwajid.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160857dc751722---35230175886.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/756fbbd2b7560a5183cc90521908449c/60769291052.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79850188850.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/47092635457.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9941727762---dobizopuvixugajifitulu.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/8912684094.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160806298e5508---xamaw.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eff31171b---gutibitatedozodukofol.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/aa124e7be914df3ec0319f32cf9dd835/71206678525.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/zakivixipevisomobedule.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/rodinadigisimadapomovak.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/vugotumovama.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b28409e60ff---89639996732.pdfIn PDF document text
    • http://jp-cable.com/d/files/kolawonakaleza.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/2e0cbd76b5acbaf2ed1d001f507fb70a/35775435925.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/63342999479.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/55107942749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=numerical+heat+transfer+and+fluid+flow+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001477e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477E 11048 bytes
SHA-256: de055c69876c85de9ba3f235a56780381b938a9e3c095a60e6ba8a38f7790660
font_01_sfnt_off00016111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16111 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17923 19332 bytes
SHA-256: 575a4923b4caff4a325aba530b8e1a45209743ec96ff77fe08baf7d389fc6c6c

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