Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb15773568f0fd89…

MALICIOUS

PDF

72.2 KB Created: 2021-06-04 08:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 413c679852e13c2ba7ceecc90cb74c4a SHA-1: e0b2efd5b88536944bfe8843bfc836ff3a6fe70b SHA-256: fb15773568f0fd8911f40ac26eda60cd8873f2a443b2f03234c4dad76b6e388e
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/pbw?utm_term=what+words+begin+with+nus PDF link annotation
    • https://gonewama.weebly.com/uploads/1/3/4/0/134095907/midefutulunuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_601db5cd3df94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_6056d5569a9d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_604724da4b773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_6015073027d87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388825/normal_5fcedd7f0d040.pdfIn PDF document text
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/8883957.pdfIn PDF document text
    • https://jinunogafexaxim.weebly.com/uploads/1/3/4/8/134884933/96972b43.pdfIn PDF document text
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/kuvevugananaruv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465252/normal_5ffcfe8bca80e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_60467a21c09aa.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/71e432c1-ce26-48f5-ba8f-28416085ee3c/how_much_is_an_old_singer_sewing_machine_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa73ca1-13ef-4022-a159-1bbf7804930d/primeros_auxilios_basicos_para_nios_en_la_escuela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bba9e1c-28b4-4b3e-8ebe-007b2cfea74d/chuunibyou_demo_koi_ga_shitai_saison_1_episode_8_vostfr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398df805-f56f-4ad3-815c-e865bdc7644d/91236596245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294da493-54cd-4e10-88e4-d48cf83e7d54/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3443b184-1caf-4511-90af-d084c1ae14ff/16935173818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee66830-f1a8-476b-8c9f-18ec63351c11/tasomowubirijipukarugudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fe196e-f85b-4355-b4fa-37231dc81217/how_to_clear_codes_on_onan_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59b03e3-06d8-4e43-ab7a-ff9faa5c9a0a/lavareguzi.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_off0000d614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD614 5300 bytes
SHA-256: f82cb0290b971e2c3a74c6d69477fe11a8e7fc491ca971690f098b9b35cf6b01
font_01_sfnt_off0000e82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82C 13720 bytes
SHA-256: 70719f84aec2e584bb979c3726d15ee5f4d8d186e1dd28303cc0f8a40265797f

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