Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae0d452819ef246…

MALICIOUS

PDF

78.8 KB Created: 2021-04-24 02:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2acceba2c50c6fe8d8d0c7414448feb2 SHA-1: cee0c703bf71679b4b60a2fc7d9129edfd5d2c61 SHA-256: fae0d452819ef246a8e249b70e7097780f0e38d61f3a9d3a9e46a9c3dfd3cdd0
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF's structure and embedded URIs are consistent with attempts to redirect users to malicious websites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=effective+writing+a+handbook+for+accountants+11th+edition+pdf+free PDF link annotation
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/kaxidowosavumedesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485813/normal_60698e1966247.pdfIn PDF document text
    • http://gagarinski.su/99368938164bksi5.pdfIn PDF document text
    • https://zobezefifoluza.weebly.com/uploads/1/3/5/3/135306737/2553018.pdfIn PDF document text
    • http://esportzmlevent.com/is_newsmax_on_sirius_satellitedyqx6.pdfIn PDF document text
    • http://yognat.space/kohler_generator_parts_diagramrrw0j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_6045c9c9ab781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_604497667924e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_5fd68048af459.pdfIn PDF document text
    • https://gojojiwegojefuw.weebly.com/uploads/1/3/2/6/132695574/e14753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_6025fe79284e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6b523b30-e324-46c0-bf62-49d2218c2dfd/dwellings_of_eldervale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e9ea2a3-7c9c-4a78-b9dc-1711b8b39d89/9616351127.pdfIn PDF document text
    • https://16dc6c2a-32e3-4a69-9eea-5b59d93654f8.filesusr.com/ugd/176c29_d024d12ffde54c6385fcbadae97aed11.pdf?index=trueIn PDF document text
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_cc917f7d1350460e98b9780b240e851d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a64ed48-28ad-4dcf-8abc-e0f6f6e08d97/65536750208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4217183-5682-45b2-9633-b0602d31dc45/fikub.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_bba7ae8fb4ce4764bcc0949654c6074c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/149e255e-a725-4bf0-b3c7-84f9fbb00a5b/baver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6667b950-69d2-4c1d-8b21-6137b9d80826/napedubozawobelewavopug.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE649 5632 bytes
SHA-256: d43f0f1e7f6d4fc10eb5b57d666e6ee86939a220b75aaeebf968489b5fbb9a27
font_01_sfnt_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 11216 bytes
SHA-256: 6e4ee92c301f7a4ca5c3651b87fd11033860a7094a12ab9ff952c4a41eb67d56
font_02_sfnt_off00011f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F47 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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