Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4ff5e849e0be52…

MALICIOUS

PDF

79.6 KB Created: 2021-09-22 19:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5962c3e0a72747879dd9fd429a068d50 SHA-1: 9b492446ce53d437a14f74190fc4622a1c82a640 SHA-256: 9d4ff5e849e0be52a00b60661b2cb2de7381905f72f5bc325c05d88b8b5159cd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, many hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://infrive.ru/uplcv?utm_term=project+igi+1+download+for+android PDF link annotation
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/mazevezasawuda.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/23390718726.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/binolipufaz.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/napulusuxumubotumaj.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/4326443cf437ec700b0ea161b61695e9/fikijux.pdfIn PDF document text
    • https://menu2uplus.com/images/file/futis.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/97609423027.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/22611221786.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16145c5ddea3a5---96055724845.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/tukejesifimajawuxedis.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/norewa.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210912203423.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/basipibofezexovimipug.pdfIn PDF document text
    • http://delve-cr.com/uploads/vulomizuwitelenuwewu.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/vovonufigujasuwugejesava.pdfIn PDF document text
    • https://showerdrainplus.com/uploads/files/202109202011483160.pdfIn PDF document text
    • http://aven.su/userfiles/file/63391966384.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/sofafuxuda.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1ko6lbt54r1lbmo6fknsuctga0/52951414532.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/71760788525.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/66032717896.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/72636599076.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_off0000d28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 10752 bytes
SHA-256: 7356b71c36edad2cb412cf9c0026c001fbb7889f73049b384af71843ef77c027
font_02_sfnt_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 17696 bytes
SHA-256: b51cb1612cbe5864701e6bff469f20d208f814bef77e7ac0b91c4b34f2aa0840

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