Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b214a421122539…

MALICIOUS

PDF

83.6 KB Created: 2021-07-01 00:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2ce278544906b0fd8c8a80848ef2d21f SHA-1: 36c93b6d9227bbec29baa459e9541264e377d102 SHA-256: 25b214a42112253999a3e9dc05c7b4274a9b1ddc246a16b47c86489931ecb461
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious document attempting to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://catamma.ru/uplcv?utm_term=ncert+science+book+class+8+extra+questions+with+answers PDF link annotation
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2bd911eeb---xariroferazinav.pdfIn PDF document text
    • http://attlas.center/userfiles/file/defajekujutepisekixuf.pdfIn PDF document text
    • http://alkanboya.com/files/file///kuwuzipe.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/049a0833ee424bd999f4d798f1406a22/73392547113.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/wafad.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/214f57f3525f29a23409707e600587ab/wopomafox.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/nlntvci0t7brnf3hpjlhp795u6/rujusesopevorapuvi.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608455efdd710---79943812898.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/rifomotonabugadagovari.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/njn7amr7k77nvbq6a3qtvtsi36/73094277983.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/68551190498.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1cac045a082b690ef35da4d238d5bed2/sudowixuriteker.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160738c672c254---wawitoxirowujesaxu.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/nsfckcjmifra7cf02jsu64m743/nuxazoxidizajetedalexez.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/cb965723dcd72b2048087be3812cbdbb/fovebejixepuma.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087a15818127---3174169147.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/tcsa1d4fdhg2g7qjb2spl2r0cd/98180144040.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-7-1/20210701013158891275.pdfIn PDF document text
    • http://midel.me/userfiles/file/40489306909.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/g5mgdplh0k96ehtq4o8c1v7rhj/13058639234.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8cd2916f69ea15ed86ed799cde5cd723/mofiwutikilitag.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/wewivefitulifuzo.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/d0670d0bb6e47f3b30dfa1ad86ac9b04/gemofowanabomexajinorosab.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/fdv25q1s1f2fo79vi3sa287vci/nolefimawefanu.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/nebate.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

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_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 11176 bytes
SHA-256: c8fb33997198d024862fbc37f78ff0ac616faa4651028ec734f0a509cc095b34
font_01_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 16392 bytes
SHA-256: d37cd02754464cb6b47fbbf8304f722da7197b2d6385bf0a5f1537b0721d15b8

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