Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06b2b511623da84…

MALICIOUS

PDF

88.5 KB Created: 2021-08-06 04:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6af4d7527e0e4c79d7a10c22c4f8fdda SHA-1: 26b160c9e1bfc7a99b22dd2a253de6c5c0654ef8 SHA-256: a06b2b511623da846b39716bdff428d074fb42ba93b612acebaaa3cf9a13007c
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/bb7ns49pv0fqoajl3m20t5s9pp/15405856729.pdf In PDF document text
    • https://alyansdugunsalonu.com/userfiles/files/19477672348.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160947cace5204---vuputowexisosezifuzun.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/gikiraribariworunexavi.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3da6cb1ec6---salapexuworis.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/nevimoselalejawozipupez.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4393e8f240---luvonudasuwirititafomi.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/kenatesifafikugegemi.pdfIn PDF document text
    • http://bienbao.net/uploads/files/64320160597.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/gfpes8n65qgpgb05tvpacr702t/34576637498.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/94974615776.pdfIn PDF document text
    • https://strechybenesov.cz/content/31998835758.pdfIn PDF document text
    • http://proxima-design.cz/files/file/fenanovitimuvagifuru.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/52ia31vrgad6d9g6lqvoituv16/59384903196.pdfIn PDF document text
    • https://chpcentre.com/files/file/68847530263.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/64872629802.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736675d2a0c---napogaxokibifaf.pdfIn PDF document text
    • http://adveotec.com/img/file/56002704011.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/zikowozu.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/72099599293.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/ramapasugofikutara.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071111887f9c---94081634433.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c11718251cba0d74483716b226e26e27/99231132976.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d40567c6aa---14824840749.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/65975384587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=formula+de+la+mediana+para+datos+agrupados+por+intervalosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 10880 bytes
SHA-256: 81e94abc823295357dc5486e6ac6c515a7ebd61e5fb4959ec6b93aec2d169f60
font_01_sfnt_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 19732 bytes
SHA-256: 6efc9b5fceaa5793d8e7ebdf33311fc881f58bc9a48b038576ec2c0d639e52a0
font_02_sfnt_off00011f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 17472 bytes
SHA-256: 11ac1bab3ad5476d00a787e6c5faae62296f5330c22d281e4993e83f09a3b194
font_03_sfnt_off0001398b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.