Malicious PDF — malware analysis report

Static analysis result for SHA-256 88eba4efa4da0ba2…

MALICIOUS

PDF

169.0 KB Created: 2021-03-14 03:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c2db348d665819f44c6d55318c781664 SHA-1: 71a7beb755a04a46177658bb898c784c83589666 SHA-256: 88eba4efa4da0ba2b1f87df5d596485b1cf38e6242551083e052d36ff843c44e
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 0.9995

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 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://jottigo.ru/wix?keyword=isaac+newton+timeline+birth+to+death PDF link annotation
    • http://natbeach.space/4401175493hw3ix.pdfIn PDF document text
    • https://cdn.sqhk.co/luwanuriwaba/hygiwhe/kipifavaro.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/course_3_chapter_4_functions_answer_keyffal5.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/L47hcG6/buffet_items_meaning.pdfIn PDF document text
    • http://zumbayuliya.online/42905341551gqv5x.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/dell_latitude_e6410_charger.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/explain_the_rainy_season_of_india.pdfIn PDF document text
    • http://5coupon.info/872352900758e7t9.pdfIn PDF document text
    • http://milano-moda.space/ingilizce_altyazl_film_izleccked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pulitisagot.atwebpages.com/austria_student_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/noruwugomaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d9bcc5-fc7e-47c0-92b0-d52a705aa75b/xidoxesegidikik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c205cc48-0dea-444c-b3c7-3b5d739050d7/75905868640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac73746c-4e78-47a2-8b9e-ef5256cba8a8/74092350615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300cf262-4ea1-4f11-97df-51683d12b719/baxabugiromexuxoxevavurel.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/53073966950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d32e4f-a91e-4dd9-a8bc-c0d2d0ba2032/76340989534.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/how_do_you_use_the_armor_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69de265f-95f0-4d5b-ab63-4b9ea8867f1b/marebixojavobuwudoseris.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/32035838623.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/can_i_pass_cfa_level_1_in_2_months.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_off0002587f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2587F 5348 bytes
SHA-256: e7251ac026c42741e65809d5892345a52cb1cb6b7e4a70c972575494697ea12e
font_01_sfnt_off00026a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A8A 13464 bytes
SHA-256: 926bd0dfa7557ba28687bc2d0d7a2fc3d7074bd932efceceaa4374add0058841

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