Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ba47b1bd244667…

MALICIOUS

PDF

86.9 KB Created: 2021-05-23 04:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aeb972d83484ed83708307b9c826a498 SHA-1: 1a7f32c19711159e096e7c616b2488862342233f SHA-256: f8ba47b1bd2446675c3ffc9dc6eefee361f69a594ad623da803bdcd46109da7b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://botokaw.ru/strik?utm_term=a+negro+nation+within+a+nation+quizlet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373504/normal_5feccd96a36f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_600f0979e4997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454170/normal_60688ccc28347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_60466730925cc.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/narisemiwimuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500444/normal_601002991f281.pdfIn PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/6114732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_6045feee3c509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_60400f2101ae1.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/9dbdb738-6a75-41cf-aa0e-52c2145799a8/bitalajijiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f90df4-c77b-4036-b69e-32b33d605fba/oster_bread_machine_5834.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/ruwek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71e9961-a69b-4c9d-ae33-b01a0b61c73c/clark_forklift_repair_service_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9633694b-bd01-433a-88dd-b8d8e86c0b5b/59945232167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e7abfd-89ed-44ef-a7e2-8bc50a3eb91b/your_perfect_right_a_guide_to_assertive_living.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6f4ff1-1704-4a3a-beae-7f54d58c300f/washington_dc_covid_vaccine_safeway.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/wuzaliro.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_off000117f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F5 5028 bytes
SHA-256: 6fe04ecdbb1b65a0e225e8c6de6e43d6a28fb0d22b246360500b656698918ea4
font_01_sfnt_off00012924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12924 10948 bytes
SHA-256: 52be1cca9e9b3979ed1f938ccbaf53ac326f473fa0bc324581dc97177fc30031

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