Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bee78e516c5c5d4…

MALICIOUS

PDF

76.5 KB Created: 2021-01-06 14:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ed53c848c32b114c6a7decd652f4f6f5 SHA-1: 789071b3157fc917e1007b93efe20d68714a5ecc SHA-256: 8bee78e516c5c5d4612f091fad6eb5f76fd67603209c3400972bbf4718b9a7b4
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=chifley+college+bidwill+campus+uniform'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/aws?utm_term=chifley+college+bidwill+campus+uniform In PDF document text
    • https://cdn.sqhk.co/niminililez/IMjbgeS/stor_mor_cypress.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f8a60a95741f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5f975f3b3b07e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427085/normal_5fdcb8adbf692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_5fd0b8c5a4fa4.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://s3.amazonaws.com/liluvad/rabijinavipuwinefisejozow.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/wunix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabbd500-d746-48e4-ad08-daffba821f2d/xuxexevegatowir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7982ab-06ba-4d96-8e07-eacfde7e05cc/customer_success_manager_resume_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6f6b93-8167-4d12-aa4d-d852547d12b4/galaxy_on_fire_2_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196252ef-5d8f-4943-b3ef-f2cec816e2c5/crucible_of_the_vampire_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9fc515-2e01-4642-a992-a2f89fed6b85/xijiparebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fc66e8-b252-450b-8202-77e84de318fb/80185969349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2899a152-b986-457b-be95-75698c414007/fibasakede.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECF 4752 bytes
SHA-256: d198d284aaef67d84d530c940e69b3b1c2c4af70ad139221cdd68996784ccb40
font_01_sfnt_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 5728 bytes
SHA-256: 1fbddb58dad9a1620043c812dd03613dd8057c5ab41c7842bb0447d6d168649b
font_02_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 10328 bytes
SHA-256: 88070702c41e883de346227df3906848c0440eafcea293400f1c12650ae6fd2b
font_03_sfnt_off00011628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11628 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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