Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8131ec0219e7fbb…

MALICIOUS

PDF

72.6 KB Created: 2021-01-04 19:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b8111a1e0851c8a05b03fd1cef6b7990 SHA-1: d5785c4fad90c2113e1501bb0c7bc40e7dcba605 SHA-256: f8131ec0219e7fbbc6112fcebc7e415456e1023aa6a8e15595801d258efabee0
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 'ggtraff.ru'. ML classification and ClamAV also strongly indicate maliciousness. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

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://ggtraff.ru/aws?utm_term=alchemy+wow+professions+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_5fd2de46f2827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f977ca0ae8a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fdfef0fc96a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fece771b6278.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/4ad80162-a4b6-43f9-a0e8-4f2a216e5b8f/tangram_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e1955d-500e-4e98-9d26-c03286f594e6/seckman_high_school_graduation_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f112e28-f90b-47c4-ba44-b63e6a78ce3a/book_report_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a74a7a-6501-4a25-9d05-a4a00c514867/pagoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5818eb9a-1305-4068-b1c1-b965f69fb5ca/dls_2016_apk_oyun_indir_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4018e87c-403f-4235-b855-c43b57271811/naruto_ultimate_ninja_storm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05bfdf1-e777-4a18-ae8a-e5ddb5967dac/laletesuroxuzubuzopa.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/super_bass_lyrics_video.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_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 5544 bytes
SHA-256: 6a91014dc4281bcd28db3b47af08cef6330c86853a84fa779f74ac65323161ec
font_01_sfnt_off0000f13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13D 10936 bytes
SHA-256: 40eadf9c59e34cb25fa07f194485d898b356b4ade5797302d61541bf36488f42

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