Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ab792232d2661c…

MALICIOUS

PDF

96.1 KB Created: 2021-04-03 13:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 602278197a5369c37f8ac0878d16f788 SHA-1: 9728e31bbba2b7cab0f0cd70b05cde73b354c9e2 SHA-256: b8ab792232d2661c54e15e9e2bb32b36f67321bd3697587c9b48b32273f9b858
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 0.9987

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://leonvi.ru/strik?utm_term=dyson+ball+vacuum+attachments+guide PDF link annotation
    • http://susurrus.space/wavupofinifuluxev9xqs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcbcbad9bf46.pdfIn PDF document text
    • http://tonagruz.ru/6447811167943vzm.pdfIn PDF document text
    • http://setofexperience.site/acselerator_quickset_manual3xqch.pdfIn PDF document text
    • http://easterthjg.com/4673648755q4w4i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_603a08ad9d36a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5fc6c3f7f1d88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5ff17d11b7b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_600e0fe084918.pdfIn PDF document text
    • http://allerlo.xyz/logitech_x-530_wiring_diagramhysdj.pdfIn PDF document text
    • http://picply.ru/microsoft_office_project_2007_free_download_for_windows_7_64_bitx86pv.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://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_7625ba1c1d6d43f3bcf5ff577d2fb374.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/kushi_audio_songs_free_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/allied_insurance_job_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/demuvoderegunafupu.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/bononokefuvivasedu.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/tovixulusefezovelevi.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/how_to_identify_saltwater_fish.pdfIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_aba1ce2762c04dd09af18ac8539eea98.pdf?index=trueIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_76eb768240ad4f1b80dbaf29c8859345.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_82e453e2bd7042afb1a5276c412bcd08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/12234958083.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/zaxiwusovugumewuvigap.pdfIn PDF document text
    • https://368af19b-b9be-4417-8ea7-dfc4611f9fec.filesusr.com/ugd/abd4c0_d13a61d6d2794f41870a1a23ee7d54b3.pdf?index=trueIn 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_off0001256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 5440 bytes
SHA-256: 06ca9fc8e89c4bda5e78488202e6708764d76312e6113b1f2625c085af576037
font_01_sfnt_off000137cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CF 13300 bytes
SHA-256: 3f5f4c526207cbaf3e2843cf8307b5490c6a7e2f44eca3048d05482e6c6dbd06
font_02_sfnt_off00016414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16414 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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