Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6a221648ed18da…

MALICIOUS

PDF

90.0 KB Created: 2021-03-27 21:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fed6bf3d309fe56167ce51143295c8fe SHA-1: c26e7c04f8c548786b5a34c3f76ed3e4576c1dd6 SHA-256: 9c6a221648ed18da808310fba855de735c755b351dd27fd1df8a20895f8097f5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable hosting services and are presented as search results for a book. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=death+of+a+salesman+book+pdf+download PDF link annotation
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/wenizati.pdfIn PDF document text
    • http://natlab.ru/manualidades_con_papel_periodico_canastas_paso_a_paso9nwa4.pdfIn PDF document text
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/zumulebu.pdfIn PDF document text
    • http://orbitan.fun/case_in_point_7th_edition_free_download16euz.pdfIn PDF document text
    • http://powerhdniy.space/what_are_the_5_components_of_intraoral_filml7sn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_601f9a53a9732.pdfIn PDF document text
    • https://duruzamuxe.weebly.com/uploads/1/3/2/3/132302842/vuteno-nofozuzusop-fuxodikutoboga-dapebuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_6049a54e9d54f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378853/normal_5fddbc6381a01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382973/normal_5fc8122f175cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_60530260b9cf5.pdfIn PDF document text
    • http://winoorama.space/what_is_the_analysis_of_the_poem_if_by_rudyard_kiplingjmgzc.pdfIn PDF document text
    • http://handler-autoscout24.com/zebra_zt410_barcode_label_printer0w32x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tosevud/wetaziradezud.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/pharm_phlash_flash_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/34577337496.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/31979314138.pdfIn PDF document text
    • http://malogamezomido.rf.gd/podezujumewukagutadij.pdfIn PDF document text
    • http://mizugegixa.epizy.com/autocad_architecture_2014_xforce_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/autocad_2016_product_key_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 5480 bytes
SHA-256: 79cec2c5f41e54e30c263dc6d6c5088dbd50dd1f194417db63bc721e4e6fba3d
font_01_sfnt_off0001202a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202A 10884 bytes
SHA-256: 6b2c11d742178ba8941a3f4b3e4bc3ae7ff46cf84e424467f6b6b7e262a9d6f9
font_02_sfnt_off0001455b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455B 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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