Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e06799ceb09efb7…

MALICIOUS

PDF

70.5 KB Created: 2021-01-05 22:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7561674d5371d03fdb789b39cc899a86 SHA-1: 98239e7a0179dda1b608b4351303f6c563ecc114 SHA-256: 5e06799ceb09efb707c846e4349adec4b82fcdad7d56aa7e5dc4685a039d1365
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded links, suggesting it is part of a link farm or SEO poisoning campaign. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/aws?utm_term=sale+banner+vector+free In PDF document text
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/nalikekuvozajub.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/AgdJgi2/darotapugejuwejapi.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/UGYtgR3/d_j_music_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/l6hajiO/60755633780.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/b6191939-53f5-4f37-8f0c-0d6460f620ab/optical_fiber_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d24aa4c-d70c-460a-8f24-091bde08d8a1/98050570738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64b4cda-6dd0-470f-a566-320b09e037a4/commonlit_respuestas_de_valoracin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/189fb996-bd06-45f7-aaed-cd287e6aac77/kifopunageletigib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d959965e-7f55-4fa1-be69-edfd94c273f2/dugarimadim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7ab06e-6e21-404f-ba67-6a1133971dc9/melazunidiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85eabe5d-6587-46c5-9aa2-91198b845b05/vagagimogexodexiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d684143e-78a1-4245-8cbc-f2246689aecc/4306772738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2392ee3e-1e9b-4855-8150-d9b003b27a21/65507815419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01845098-b5fd-4890-affd-665249ac4f59/7694147666.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_off0000ceec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEC 4740 bytes
SHA-256: 2b0510ce770b5453f658a4572e25ef4c0f6663885e8c676174a56da27b5a6953
font_01_sfnt_off0000df0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0D 9616 bytes
SHA-256: c4501becd6bf5f48b78c10558c1341252d493465108f174e134697e25a1141ce
font_02_sfnt_off0000ff65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF65 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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