Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71154850ab5e502…

MALICIOUS

PDF

86.7 KB Created: 2021-07-03 20:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bd8cb4201bbdbd06390890124eb4ba8f SHA-1: 04d7025fa5c016f075ea0044b3226e1933bd3356 SHA-256: b71154850ab5e5028b8f1f3a35f38be4d4deed866f914f2d2ea7dce527d2fe30
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript and a significant number of external links, many pointing to PDF files hosted on compromised WordPress sites. This indicates an attempt to lure users to malicious content, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://soba05.org/wp-content/plugins/super-forms/uploads/php/files/818c5d8b4b0c93813587f3ad8d7552af/zemuxazevipasawijoweb.pdf In PDF document text
    • http://ahxxzx.com/userfiles/202104/file/82095873946.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210624_11787CC500AC30A7.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/watemakim.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/21822629552.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/1pbahdku88pt091ftqrlpb5lb7/kisoguteg.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e0341e7c6d00c3bd3c7c8a8db607931/95276893788.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608695212faa6---95765331231.pdfIn PDF document text
    • http://homeopathyhk.com/files/30584021073.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160943547cdc62---muvirixasovi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/dd30616f45f248b5f84d7ddb3c92d562/dibomewosonogugu.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f97f1270a---56611802902.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607924cb6821b---86876542917.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/im6uhtotr6ts59mr36it613hf9/noxosibi.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/69d571db69b4363f4996f121a6162df2/xefunifutoferafepelowesa.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/110643056312.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/27936381995.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/fukenalineluxexefoguzu.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/90aa92886285379e802bc7cb7dd66f34/numajitolegonapixanipurin.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/vuxezolawuvase.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/6debc6b8427f9e61ad996ce5abacd5ac/10861981080.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/rn8gudbno1k6804bj7iktpunds/10071468142.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/gutilazarixidifapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+second+law+of+motionPDF 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_off0000eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 10796 bytes
SHA-256: e2879186a917f51b059900084f751cdc654d126ec41a1ae9322e931a75085de7
font_01_sfnt_off0001035f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035F 18728 bytes
SHA-256: d81a32912a4ee1d204f6a822fe0685a0c4b9c9ae146a9e80389a69790f5e3a36
font_02_sfnt_off000133e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1