Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabb2b87c20e558f…

MALICIOUS

PDF

73.6 KB Created: 2021-04-04 05:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 447e808b2d776aca89e49d425a320289 SHA-1: 50d0f1c7bd1e6079eefccfe84bd564e91210fd71 SHA-256: cabb2b87c20e558f41790cc74f769f11ae3518bbcb6b6685e0af1f72aca9db3e
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 0.9993

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://gimoguvi.ru/wix?keyword=possini+lighting+manufacturer PDF link annotation
    • http://bigpleasure.ru/which_function_does_not_belong_with_the_other_three5quk1.pdfIn PDF document text
    • http://hookup754.fun/reality_high_movie_480pwj1gd.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/the_100_year_life_book_amazon.pdfIn PDF document text
    • http://vbruti.site/gate_jieitai_kanochi_nite_kaku_tatakaeri_roryynlly.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/jifejozekiwamemetof.pdfIn PDF document text
    • http://opensol.xyz/58804795284xky5a.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/rest_api_documentation_example.pdfIn PDF document text
    • http://recepty-dd.info/booklet_template_word_doc5lght.pdfIn PDF document text
    • http://mjawebdesign.net/27338578908swu5d.pdfIn PDF document text
    • http://ehaberdevlet.com/wordly_wise_3000_book_3_answer_keyl0uox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jekurur.atwebpages.com/russian_formalist_literary_criticism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bf90b1-4f2f-4c7d-8058-cabee7cc435d/kung_fu_tea_part_time_job.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_9626f5602f6a42bf966b37684f321b63.pdf?index=trueIn PDF document text
    • https://359ea524-acbf-40a7-8d58-ee96a8f10bc8.filesusr.com/ugd/ca2e76_4f8065e0a8784a74849168e7773c5144.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/06fc7e7c-5eff-431b-9c8e-7a86df33a228/muxivipafabegew.pdfIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_e254eaddf72449ea9e7f00025834f760.pdf?index=trueIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_9fa119e653cc49a79d96e4d9fed066e7.pdf?index=trueIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_4dd8ab2e24434d5294a499ba00a0261a.pdf?index=trueIn PDF document text
    • https://264cdfe8-48fc-440e-bff3-938583425051.filesusr.com/ugd/cd20dc_416255c9019a477eac488a83ff189ec3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b957f26-5d47-4d7f-9fea-9b88a2482cf0/screenwriters_bible_free_download.pdfIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_41de468685864f39a90ed58f2b93896e.pdf?index=trueIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/gatosibizafozejekizome.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_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 5296 bytes
SHA-256: 846bc28b4e2c4341e390bccdd7cdc46d5039fa577103ecf646af8a7048957b03
font_01_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 10500 bytes
SHA-256: 1331578df17aac83e9c4fa540f867f1a92785e63028f70b01399268c222609dd

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