Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8df67c9cbe2140b…

MALICIOUS

PDF

82.2 KB Created: 2021-06-26 14:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2db1b1c751d409a8492babd61ba77882 SHA-1: 295da4d2c434ae721180094422dbfb4da74eb151 SHA-256: e8df67c9cbe2140b1673b753ce373e6bf4bbad56889ae34a9d6ed0b13c547aa1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, with the document body being unreadable due to its binary nature. The presence of multiple compromised CMS upload links further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/9de459a0a80f5953cc070d74e8c6b995/62903866584.pdf In PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b29594d5133---savobe.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160853df0bd27b---tanuteramipewanoxomut.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/d1c3423194d51f53b4b42aaaa191a2fa/kefuvuvo.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/pewagojuwupiwo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a8b6a1474c00bc69e62cad89b9761062/jifarefupakosi.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/73236806327.pdfIn PDF document text
    • http://armanetti.com/images/wuluwidojunefu.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/zamomidovepapo.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/52661239295.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/oh0lk6d7f2ibaibivcnbdgnq69/tonipakalid.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/7a3f795fe8db4ac33db6f7299f753c62/wiwutapag.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9dngkros6bqhguoqneog3p58i9/ganexo.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/87j9naldsgd3aqj98hencqgqek/66058868480.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec8cd2205---dusume.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a2e06c645e978ea589e11ab2804cef6/24914932480.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/98943647312.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d6a402991---3869314559.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f88ca465a6---32389763590.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/92627422838.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/1000238419.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/12218104460.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/818018903de5a8204d3dd377b89ac8d0/sesodonaviwezosogunaze.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/34993530172.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=real+racing+3+mod+apk+android+1PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 17688 bytes
SHA-256: fda48d0fd9be68eff04e973b7bfc5ac37e7468ab654490b4697196aa9682148b
font_01_sfnt_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12282 10952 bytes
SHA-256: b37b0e066a3011a7942113aa06ab4543652264539c515fa081738e58026b4a8a