Malicious PDF — malware analysis report

Static analysis result for SHA-256 69afd3089dd3346d…

MALICIOUS

PDF

74.6 KB Created: 2020-12-17 12:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6a3d563aef28c81bb979d38a915cec7c SHA-1: 19b84b43515b8feab83bac1516c8b4fa3482fe17 SHA-256: 69afd3089dd3346dce2dea9b40438810808665942b122b1364affe3efdf366ed
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to unknown or potentially malicious domains, suggesting a link farm or SEO spam operation. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to external content, likely for malicious purposes such as phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=san+mateo+county+office+of+education+superintendent PDF link annotation
    • https://pejuloxekipural.weebly.com/uploads/1/3/4/4/134403187/dedad.pdfIn PDF document text
    • https://badevejolaf.weebly.com/uploads/1/3/4/8/134867981/2363245.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/1102644.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459319/normal_5fca845e445cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484375/normal_5fcba20ca7c35.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/c33d17d4-9f0e-428c-acd4-08650a956e34/acurite_wireless_thermometer_model_00754_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ab1f4d-6f97-443c-bfb7-0e3da6a7fd38/17595164775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5499b4-f4db-41d0-a466-05f0917e77a5/principles_of_genetics_snustad_3rd_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e844cd1e280355d45049/t/5fc1469e145a8629dcdfc95b/1606502046963/geometry_tests.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5acadaffbf90a660b1fb2/t/5fc612a63f75b16643a437fd/1606816425833/8170597279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfd5521-3255-4cc2-bdc7-b316ce9304fa/zaremu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c049c6d9645836281f45/t/5fc90d4564ddc46789a64938/1607011655857/monster_dash_5k_results_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc8fbf6-68be-4c03-a96f-22d5d9ba5e62/mercruiser_service_manual_17.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_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 5356 bytes
SHA-256: cf35adec0a5e6eaa57a42fc228f34ae9d0dbea140ebe06072f4963f00e993ff3
font_01_sfnt_off0000e8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 11052 bytes
SHA-256: d0dcde9fcb34e6eb495275b72ced8cc463eab36c25cd9302e24c5293c5defb66
font_02_sfnt_off00010e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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