Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e42100b138b305…

MALICIOUS

PDF

81.1 KB Created: 2021-06-17 04:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d8a06833f947d5b3f786ddab2531d430 SHA-1: c22fbf1df512d35412caaa36b0c3ee4462c17756 SHA-256: 23e42100b138b305900157c43c2449b10258764522040f55b872875fd518c97e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'password-protected archive lure' heuristic further suggests that the document is intended to trick users into downloading and opening a password-protected file, likely containing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=glitch+intro+after+effects+template+free PDF link annotation
    • http://alexlunacoach.com/img/editor/file/wotasexotogoz.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/17782847507.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c6e892677bc6b129f3b13b9f2f5c9b2a/giranokizulito.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d633720535---ronefozadokifegej.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bgok1q88qou7qkf8u0vlf6j872/58152123865.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/8ffee4972a9f67b9673fd5e2e19f07d2/91010080097.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/lesowokotaxinaguzoso.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8caca4f1b3---95265208308.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078606a79c0e---87772999978.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/cm2l264dg5oeg32dncp8b20g4a/lesasoretotef.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/sr7ae0t9v90alb58p95gqk4c2h/xujuveririf.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/19c1511394e9887ce9f4243d2bac6802/77344865208.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/eaqed7kil3tpi5lkfj3b2tc6m1/sumuvorifabavojesubis.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608750eb75fce---lagakozonigivijasibavi.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/242590c966cb7e30f05bb9821e38efe2/19498782456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 5284 bytes
SHA-256: 01e462d64a6cef1ee5f52d95d40e02e9a77e83c4fcd68232c8dd78ea26560444
font_01_sfnt_off00010f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F60 11028 bytes
SHA-256: 335da94538bef908d1b550607188e51092a870338599f4ad23852128f67b2a48

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