Malicious PDF — malware analysis report

Static analysis result for SHA-256 06387486daa84375…

MALICIOUS

PDF

84.6 KB Created: 2021-09-15 19:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4ff80f5c84a70229a3a7382d2580d2ed SHA-1: 48dbe7a64085786fa1eb376f7f82fc807a8569fb SHA-256: 06387486daa8437589f6e6a5e81c66bf41e344bc7ee1434c3f4405622146e7d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The PDF's structure suggests it acts as a link farm, directing users to potentially harmful content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://garglob.ru/uplcv?utm_term=repair+vehicle+cheat+gta+5+pc PDF link annotation
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140373b07394---20306859191.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6840f47b2efd4dcbb418962f85ebaed/54929839606.pdfIn PDF document text
    • https://letajicikoberce.cz/userfiles/file/87812850741.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/guzixezikog.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/96727926457.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/tebonujirunapivirifatut.pdfIn PDF document text
    • http://etkenkalip.com/files/jasidalumokesesariwujunu.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/bulusaganotulapoli.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/4dba1c31d056da06dab4b981b021cb7e/nafadanulatedora.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/kosurelofonezibapu.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210915_CBD8813AE10A8082.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/45818946988.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/munanumatilenufad.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109080935203990.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/16493793046.pdfIn PDF document text
    • http://amdind.com/userfiles/file/tufejonomoretogoxaxanetol.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/pagakopusokekutaredos.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132f442b9f96---97315726607.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/43942219776.pdfIn PDF document text
    • http://blueyee.com/upload/file/141706021405.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/79475269064.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400ec3192b9---fesajesapuvepuz.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/boserisuwewura.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_off0000e7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 17232 bytes
SHA-256: 5fdf7e8ffc98605e12033be4b714f50ddf9965729434aff615b91d5bcb363b2c
font_01_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6F 10504 bytes
SHA-256: df1b0cdf726288185b6fd11d918e29d14d916e76c86aa8a710adfc463813e9c3