Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a20bb25660b6c8…

MALICIOUS

PDF

102.1 KB Created: 2021-06-25 18:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 871dae70238d4c1ef1b2cfa02e4e66ea SHA-1: 885aeeb2ed6bb06401973d944870a6f2674967f8 SHA-256: 26a20bb25660b6c8bcbf4b4bbb9ec64d98de38bb3ac3980eea3fe316bbd16985
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and embedded links indicate it is likely part of a phishing or scam campaign, attempting to lure victims to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crewmak.ru/uplcv?utm_term=how+to+clean+lipstick+from+carpet PDF link annotation
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/duvigovalan.pdfIn PDF document text
    • http://innotack.com/userfiles/files/larigekot.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e0e3add0c---gokavidugagim.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16083e46329ffb---74284235107.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/kozimikonetimevuvalutarug.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4ee34c93a27db7fd567c8e5c86e14aaf/84775793589.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a71ffe0e6b2---vurevosixubenidepi.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d996241491---88206095408.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/tuvitezapupemezotom.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/96430949477.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/fb043a9e8ed6b4eb8de32553073434f3/89682165675.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/gazizixifuxanadel.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/489fb795d5d014977589db080c8406c0/xalujatowekolevubeliziwo.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/3a2b36cfbc59d47991c2cb3414bc6ed9/56631016609.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bfbab99da---69459424427.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/n6pkacehte8eh1h6b1cv5ab8pp/tinajomobotule.pdfIn PDF document text
    • http://summithigh49.com/clients/3/33/3334069ac8a672cbece4a9536eb221cc/File/nareleg.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3df1f7b305---7326464752.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbcac2eecc---90822508725.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/af427b6d531c45a599138d835a837ab0/31966572294.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_off00012d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8F 17124 bytes
SHA-256: fde3b8ee258c9efb85315f6f5ffbb340ba8c7fef68bac0a8a06a97caee198d44
font_01_sfnt_off00015a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A4F 10812 bytes
SHA-256: 712f110371f11bd583ad185196e9d7e3d619faa6e704b3e47b570ec62d2fc307
font_02_sfnt_off0001733e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1733E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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