Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a3ad8afad55f30…

MALICIOUS

PDF

77.2 KB Created: 2021-03-20 03:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d234b560ae87862aa4858de352f5fd07 SHA-1: 556f2e66b955d89c37094e5d6020595875022054 SHA-256: e3a3ad8afad55f30176e56d9ae8f374548caaf875b48f0d84804e960fc042c88
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/wix?keyword=destiny+2+explosive+payload+vs+timed+payload PDF link annotation
    • http://xokapik.mywebcommunity.org/andhra_jyothi_telugu_news_paper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459939/normal_5ffdd1f568d47.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/bifebagufefonajirivov.pdfIn PDF document text
    • http://petonopelun.iblogger.org/approval_format_sample.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_6039262a0ba03.pdfIn PDF document text
    • http://sowufevoga.iblogger.org/56773025337.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/60719169180.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jupanifoz.epizy.com/occupational_health_and_safety_act_regulations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a39a4a7-8f58-4a55-8c4f-4877c3afbfdd/how_to_get_rid_of_architect_pop_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517f111a-733b-4498-9fef-64a5972cbbbc/what_is_shooting_an_elephant_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba28405-b5a9-4f95-acd2-84a7ea212ad9/poulan_p3416_primer_bulb.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/butterfly_fly_away_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/89567376124.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/chamatkar_full_movie_hd_1080p_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b8c9ef-c777-40fc-a8ad-1d34f0028df0/three_tier_architecture_data_warehouse.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/is_civil_engineering_a_good_career_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfa584d-7c8e-4c79-88c4-b6587ab4a20d/patadojafetilebobafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d023e2f8-8f8c-4d99-a774-6bf65f998b35/mokenizotisiv.pdfIn PDF document text
    • http://jewabavetedow.epizy.com/68673636906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312aa303-fb42-4ac8-8096-90e54588a473/sacred_geometry_shapes.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_off0000ee3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3C 5372 bytes
SHA-256: 5d2d7dfd3086d77b39cb7b0b8f514c77a08793f95a687b95121d58c219f6c7fc
font_01_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 11280 bytes
SHA-256: ee4960b06ed07b99e88328e24bb4302f1340ce07ef4b7fc0ffdf15955c62ddfd

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