Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6c2bb2a525353f…

MALICIOUS

PDF

85.9 KB Created: 2021-09-15 21:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9aa0de2bf804162bfb5f2c82646f10be SHA-1: ac4222f75fe7a0dcaf0e4ff9ac2dbd3da08186a4 SHA-256: 6e6c2bb2a525353f364f5594acad731a62431392ba943af4b838bcfc0a77d31d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript, flagged by heuristics, indicates potential for malicious actions such as downloading further payloads or redirecting users to malicious sites. ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=metal+gear+solid+apk+obb+download PDF link annotation
    • http://vocal.bpv.su/content/files/files/82187712771.pdfIn PDF document text
    • http://proleague.dk/userfiles/file/lufosivi.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/72182124527.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/zowesumaletiliromeravijaf.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/45829581792.pdfIn PDF document text
    • https://www.confirmedtour.com/files/8834184034.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/7qmfnv9mlqr739qs25pfturn35/44113946698.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/86941615000.pdfIn PDF document text
    • http://gdgom.com/upload/file/210905202223663140j1710e6ggm7j.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/81194066275.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/puxonufasomije.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/wibitogipaw.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/82374007194.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/9507985033.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/28689195189.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/65678655731.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/vuzufevo.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/8831799652.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/balimigupusonul.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/41069263274.pdfIn PDF document text
    • http://co-mit.com/uploads/files/logiwuladagajomixupolu.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/74385456944.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/6189330471.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/47817084731.pdfIn PDF document text
    • https://preciseenergygroup.com/media/50456174791.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/27950545513.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_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 10880 bytes
SHA-256: b6b289d627719c249315b8f8a0a1f4f602521b23a0c89bdd742a8e02b2278099
font_01_sfnt_off0001019b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AD 18492 bytes
SHA-256: 8385b97b0a9deda859f336bdd467922fe3e6836b7aef472f6add202663254b7c