Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de6fc7b7145b52f…

MALICIOUS

PDF

75.1 KB Created: 2021-05-18 12:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 753bbe010bb24a1c66fcbb627238585b SHA-1: 6e29534de33fc7701ad9f98c5ef56cf282b64a27 SHA-256: 0de6fc7b7145b52fc258f68b6d79025b8179cedf712e1d8ba45ab5e996c8df77
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/strik?utm_term=what+is+workshop+safety+rules'. This URL is likely used to phish credentials or deliver a secondary payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=what+is+workshop+safety+rules In PDF document text
    • https://static.s123-cdn-static.com/uploads/4464053/normal_5fee99b1a179f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_606797b49413f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484093/normal_603ccf3f7199a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_605cb8f6909d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_5fcc747ec3ab0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fe1f712c42c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6cfd830-9f46-45de-9d88-bc7efe05edd8/shepherd_the_flock_of_god_2019_jwpub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378b4429-4c3d-431b-bb3e-c9a714cda61d/78787912421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d5224b-5440-4a63-9f9f-1964b725d18b/da_vinci_codex_atlanticus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0816d5a8-90a8-4545-b5c8-8739b8562ea6/6_16_9_45.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271eb065-9b5f-43f2-81aa-76c74c69b82a/22440822889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4e7535-56fd-43de-896e-af2dce0c7134/suzijidamogo.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/sherlock_holmes_book_1927.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/10042984548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dcb2824-48a0-444e-a0b4-66f5b9ab0e0f/new_moon_november_2020_astrology_king.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/is_a_elgato_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d127ef7a-a2df-4e3c-832f-59c88db76912/the_trumpet_of_the_swan_movie_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/sizogokipidigiridupobiper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2975f6e4-5312-4935-af1f-6e67db3e47be/guwulilenim.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/66058038485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf558c38-1a8a-4b90-aa93-b6edd86d07cb/lugamojepadurozufepo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 5260 bytes
SHA-256: 4524b28ec55ac5cb28be276fbb0f0d796d52bd6471b8d2f990c18cab47bda6b7
font_01_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 10232 bytes
SHA-256: e19315aee85fee06c54d17917f588aff0d017e4beae296dc90dafc9abd9fe820

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