Malicious PDF — malware analysis report

Static analysis result for SHA-256 38136e0f9c984a61…

MALICIOUS

PDF

46.4 KB Created: 2020-11-02 19:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c459ae45814cb75d2bc26bd63732318d SHA-1: 347532eaee631adbad78feb41cd859bcab0aa19f SHA-256: 38136e0f9c984a61ce17b9a0724efe4877fa6daef56754a4583882bb806ca515
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, with several heuristics indicating a malicious redirector and a link farm. The ML classifier also strongly flagged this PDF as malicious. The primary URL points to a redirector that includes a 'play poker free' keyword, suggesting a lure to a potentially malicious site.

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 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?keyword=play+poker+free+against+computer In PDF document text
    • https://xasotuda.weebly.com/uploads/1/3/4/2/134235861/puses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_5f9788db73e11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f9b9d3c6862d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f9a5a6f34867.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/bupijila/appsc_group_4_syllabus_2019_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390d41f0-e50f-4945-898c-6d0a3903c6c3/54751724180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646b6e30-9e26-409d-acb5-2a070dfdd144/47945619336.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/5.1_calculating_properties_shapes_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/67748230369.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/34978260674.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_off000069ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AD 5384 bytes
SHA-256: 259e3ec4e26526b5971e815c7286bbb78045bc9a67dec8b3d23b191f39d36523
font_01_sfnt_off00007bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF7 10268 bytes
SHA-256: 209798b52e35a749596a364d6682904860c4cdd3c147789f944286f237a2290f
font_02_sfnt_off00009f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.