Malicious PDF — malware analysis report

Static analysis result for SHA-256 75495bfa7be68a75…

MALICIOUS

PDF

83.8 KB Created: 2021-09-08 00:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: af21853a0691198dc6708382e8d1a819 SHA-1: 2407f87269a21266702ef28bcfe11bd7b21ba71e SHA-256: 75495bfa7be68a75ab63a386c2e4600c1f0abea63f1f852f36326bc47bc99c49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the document likely serving as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://evergreencans.com/userfiles/file/7166548194.pdf In PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eacf472da1---81317470643.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/95868915802.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/0fd08830cccdef824ea53969166cbde4/53137001610.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/vawunosodamemiguzuno.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/febaxisojinodola.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/zubufopirugolibenijeku.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f0a9fa0b---xuludarizusufifedap.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/8572201229.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0862dd1fafce138b8bdfdb9c3f2a923e/dexivuvimos.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/pakalapenomagaze.pdfIn PDF document text
    • http://candientushinko.com/images/file/silubozidisetumiberurowo.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16269516540615.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/nuputaruketifak.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1d193d7fbad33c683f919c2901644ce8/57458823383.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775a7c0f142---tusejunipovu.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/85554163116.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/90619858589.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/9991771108.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/e3c9351dd219f74e91ff1376794c93e8/38479327364.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/2b3f9381c9ad1a8963d28f0d26a1718d/taravovulukimebej.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102e8455fc82---rokove.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/59340444804.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/waxajofefijobajijuke.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202108300354585373.pdfIn PDF document text
    • http://novichiha.ru/pic/file/mesubak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=parveen+shakir+poetry+books+pdfPDF 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_off0000db89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 10960 bytes
SHA-256: 61a8a3d9993253485ca07ea6e2d575632545333b2f0571c74afd6bd4ad4b3980
font_02_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 20056 bytes
SHA-256: c57603b563e41aed8fd5e06edab78db1f5367502d23f7e5ccb8250c9a30daad6