Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c276284d76e908b…

MALICIOUS

PDF

60.3 KB Created: 2020-10-03 02:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 88908826c984ace9b7a892047381dd56 SHA-1: 6b0e5763a04631f1271708efd108b60a8cc1659c SHA-256: 7c276284d76e908b225ada9499b34462a76327e732bda8253c00b81ec39f82a3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=m-+mmp-+1-+10+grado+de+compactacion In PDF document text
    • http://files.hinsdaleracquetgang.com/uploads/1/3/0/9/130969776/kerurexitu.pdfIn PDF document text
    • http://siweb.carolmeadsart.com/uploads/1/3/1/4/131453960/40bac6d1884291b.pdfIn PDF document text
    • http://files.airstreamroadtrips.com/uploads/1/3/1/3/131380107/2ed11f5e.pdfIn PDF document text
    • http://buzodijo.innovativeeducation.org/uploads/1/3/1/3/131379685/lafifu-werupetopelibe.pdfIn PDF document text
    • https://site-1036873.mozfiles.com/files/1036873/xovev.pdfIn PDF document text
    • https://site-1038820.mozfiles.com/files/1038820/86011737081.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/noxotifanogaju.pdfIn PDF document text
    • https://site-1042781.mozfiles.com/files/1042781/jiwadelomulilemotaxo.pdfIn PDF document text
    • https://site-1040354.mozfiles.com/files/1040354/86376193307.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/8274879129.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/704b593f-d1db-480d-88b5-f4b0402de55d/35253550936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79588d8d-ef55-45d8-bce9-76dea5e42956/xaxazibufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5395331-a436-4748-887a-8c0c6c7a6d2a/59228696873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230352ea-8d43-47b8-be23-f988439e8a53/movozomiredibisumowuxewi.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_off0000ac3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3A 5416 bytes
SHA-256: b7331190af6f97289e229b415f8afa7023d206a365866e68de326b34a66857e0
font_01_sfnt_off0000beaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAA 11156 bytes
SHA-256: 61a20ac8cbce2c5553e8d75f73a25caf2c0a70bc4ceee07eeeb6aa0664487557

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