Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37ae85db3905b34…

MALICIOUS

PDF

82.4 KB Created: 2021-09-02 10:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f4cea8e23a17836d7ce6af608833836 SHA-1: afeb65e439e56f69ee5d5e7969e333c0f8b5bc62 SHA-256: e37ae85db3905b34ee8c6dbf7070fb5e0a82f1ee6b8c3837f34824a2f111c28d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://catamma.ru/uplcv?utm_term=han+dynasty+inventions PDF link annotation
    • http://zonweringbelgie.com/ckfinder/userfiles/files/juzemawefasawaw.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/sidinubotisoziza.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/460cc8d9b4eb9f205eb496d351403828/mikape.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/e16fe88368e5f01e2835b79f669e5f9a/61691607698.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076f7355f6cb---26905338498.pdfIn PDF document text
    • http://fructusartis.com/i/File/6471882965.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/rupiwi.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611858d245596---17443386659.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/4704315496.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/lorupi.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/s1dvneme5gn7gghtm46nmlls61/lorufeju.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3afb086d2---85875961980.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/jatixalejutajenu.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/65410690552.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/40466161138.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/biwesilijeg.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/3d3f0e8f65ca9fbc1061412a565c3896/lezozetuzotem.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/64276511971.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/vowotokoxisibawamita.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829a6625aa1---bapapa.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/folidakesisawumo.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d40e982124553774508cc5a8f68bc800/54989228196.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_off0000df66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 17340 bytes
SHA-256: 79a4802fe1aa52298c29b2917895ba3891500bf77bf0f081cc755c234700b830
font_02_sfnt_off0001245e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245E 10264 bytes
SHA-256: 3a833edf80cce48e7ff3f7614a8b300a5ead09d1d65c716cda77aa47980186d9

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