Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d826b0128a8524…

MALICIOUS

PDF

70.3 KB Created: 2021-01-03 15:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6c6bc9a657a36597435f2b3b25baa389 SHA-1: ea10f2c44e6c806d4de6d818b7dda7f6a31964bf SHA-256: e5d826b0128a8524d63996d1997fe14adf898a2d700b970258e94de850512746
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. One prominent link, disguised as a search result for 'Dragon ball z opening english lyrics', points to 'https://gettraff.ru/123?utm_term=dragon+ball+z+opening+english+lyrics', which is flagged as malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=dragon+ball+z+opening+english+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f891f7fe8047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_5fdbd8d40bdc0.pdfIn PDF document text
    • https://fuvapele.weebly.com/uploads/1/3/0/7/130738919/1e2383ee5877.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/L2uijh8/wijedenegalaxosozuro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5fbcf69cad6af.pdfIn PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/bekuxewesawewid-xafufugopaduku-viwulewi-madomevamojiker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5fa2e07fd8be4.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/4hdaidW/1knuddelz_code_for_penguin_simulator_2019.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/708123d2-2071-4172-af2f-5275a85aa4e2/the_art_of_horror_an_illustrated_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8283f874-457b-4132-902e-8b65a2b1e655/titodetojewudijirut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1937b5c3-960f-4554-8455-ba4b84ed5ebe/86329300386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ad89b1-129c-4f2d-8056-6feaf8df8836/fasa_star_trek_ship_recognition_manual.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_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 5196 bytes
SHA-256: 5dda59678576b87776c1c64ad7d3facc7ebc5eaf42aadd19632caef05002da71
font_01_sfnt_off0000da76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA76 10464 bytes
SHA-256: 2fc706827651efe61c7d3a229f1d5acbd64da56afce1d5f379ca8b444a9f908c
font_02_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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