Malicious PDF — malware analysis report

Static analysis result for SHA-256 120effd7adf26043…

MALICIOUS

PDF

87.4 KB Created: 2021-07-14 10:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9d1a6f43eb59fd4cdcc7cc9b297a9bbc SHA-1: 37f94debe7c5e4439e4739af8f8556c83837b7ea SHA-256: 120effd7adf26043474fc848f61f2581464495c871bd1d7663240e77d4268535
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised websites, a common tactic for distributing malware or phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0853b76362---27815383546.pdf In PDF document text
    • http://cableesmaltado.com/d/files/41480430703.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/35287805671.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/10463286394.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608db6ace940a---kotobo.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d57c507e2dc---96184257410.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/c4f962b0d9d4ae9d7475483020855efc/3347540342.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099dcc95ca6c---31039182727.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/79204895014.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3721eaa4762723dc22fd5e97487a9627/84895143217.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/7bb9f4cc0217a9bc6d1cdfd500c0e7c7/48182842835.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/kodomofekak.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9dc385161---87759832634.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160e47f9186a83---bogetususunawixodem.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f632134c17f334ba68262a7f8f7a61f4/87934260327.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/60fp2ogef7u33j3jupqr5apndk/xunakepireseburapenirup.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/d236858e271c7b5037e26449b025f238/71116066041.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/16002145430.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/eb4d33dad04ebde25d175b6328197a82/batoboxopojox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=commercial+law+in+south+africa+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_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 17272 bytes
SHA-256: cfa09fecf399be37ba0bd351c8322f6a2bc2da1a167cd394aa7feebb8c0fcfaa
font_01_sfnt_off00011d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3E 11104 bytes
SHA-256: 0c6527f8743a07c8c3f03d76f1d269899c07a884227104098909113329e7061c
font_02_sfnt_off000136fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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