Malicious PDF — malware analysis report

Static analysis result for SHA-256 01750bd25140606d…

MALICIOUS

PDF

84.8 KB Created: 2021-09-03 13:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6e98740becbc8d7973e961c84722177e SHA-1: 16523230ada65e023b3e67f26304f65ff3ccd719 SHA-256: 01750bd25140606dbe8e67419274a613bcfc56ff43dccf4f31612e9726cba857
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the URL structure and heuristic firings point to a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=labio+leporino+diagnostico+pdf PDF link annotation
    • https://laser123.com/geektic/files/rutunukifufunukunidojusam.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/653fb0f2f0598012aa73db97f1989c87/56163606363.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607543754eded---gagejozaniz.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/27294866931.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/popunarabok.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/17622993696.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da288e238d4---vopapebajeki.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/jomifik.pdfIn PDF document text
    • https://appfacile.it/file/tenuxil.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/b4f259b89f6ef30da4ed83f14b97ece3/juzumewaxawikanuv.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/velezigifaxogopel.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/24057743934.pdfIn PDF document text
    • http://cutskytools.com/d/files/8114156091.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/bexekegaratupiferufedagu.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/9a3a787c3ffbf9a65f69d9eeb12326f7/63905331014.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/ravogodajuvibokujufiki.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/37182379525.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160701e15ebe33---55631044639.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608274ae83581---50797629697.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/sunaxiranexedekemukolapes.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/nipetijim.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4efe3cfe9---13146097697.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/vumorilixivatele.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16108a394d1cbb---85643245859.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33205269202.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_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 19288 bytes
SHA-256: 6eb5c4fa295bf5a1a4bda96ee0c9365af68968842a3609ccd10a4508d00bdfe8
font_01_sfnt_off00011353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11353 10892 bytes
SHA-256: 24361d1076606024cf5fbe5766d685d346a22e260da7c57566838ff62b9fbad3
font_02_sfnt_off00012c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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