Malicious PDF — malware analysis report

Static analysis result for SHA-256 9567a1f4d9b70c0a…

MALICIOUS

PDF

90.4 KB Created: 2021-07-31 14:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c4d3bb1d1a59793f52d1f7c5d9219c4a SHA-1: fd5eac44af43da9206990ae92da4e31deabe8796 SHA-256: 9567a1f4d9b70c0a572b0477a8c2f0b1260f5ce287b90aee5daae0736905d0b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO manipulation or to serve malicious content. The presence of multiple external URIs and link farm heuristics supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://orrizon.ru/images/file/sevewezof.pdf In PDF document text
    • http://lnshiyue.com/userfiles/file/20210703153655_42194643.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c175c5b23f1---4164260981.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/a4450e454842e101fbe3f6f59ea20140/gomupo.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/20290982839.pdfIn PDF document text
    • http://coffee33.ru/archive/file/motixujudadijulinolo.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/zimilowolanuxivizuzikilam.pdfIn PDF document text
    • http://dzbnf.com/upload/file///79455906094.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9eb055f06---70385021661.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/nibimifoxolunifabawigori.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/389b8714675555011123115a8b3a66a7/relilid.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/34088730853.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/58027462264.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/85209230367.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ae957dfc---30466505956.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/86690393370.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/86571322541.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dad0535a6c7---48210248708.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7141d575d9---tubonowuve.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160960d0d7b7d4---kuxenodizum.pdfIn PDF document text
    • https://thepainter.asia/upload/files/xirigi.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/tk3d9cc0lg0ah1kkqee1cc39h2/fuvaraw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=five+nights+at+freddy%27s+2+online+free+no+downloadPDF 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

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_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D3 17620 bytes
SHA-256: 97395c2520abf0de0ffacae5bce18ea8d3e857eb73d98894059489e667fc7b74
font_02_sfnt_off0001419e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1419E 11028 bytes
SHA-256: 00b2f713bef9ba45f444b605b551e2727d9ed9cbdc47b5014bee923864fb47b6

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