Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4663cf99c315814…

MALICIOUS

PDF

77.3 KB Created: 2021-03-30 11:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7318498cdd545743036321c84acd8b3f SHA-1: 06cfba9cf826b5d090da3658515e948c80e4b17b SHA-256: b4663cf99c315814af14bce5be828f412098e0b0d4b066792c7c014e7d40d807
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 0.9996

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://midufefew.ru/award?keyword=nutritional+value+of+mango+fruit+pdf PDF link annotation
    • https://cdn.sqhk.co/nomuzali/Qij4Mha/house_paint_colours_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/rhfjgij/22340142860.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/f7iikib/bambi_shoes_size_guide.pdfIn PDF document text
    • http://tulakijumipad.22web.org/inherit_from_template_class_c.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/gfG7aJC/word_jumble_puzzle_creator.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/create_auto_reply_template_outlook_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/jigixomavola/hec8Hpg/wadeluvufugur.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/jggdUjf/99350155361.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/hhf6EJL/airplane_for_sale_by_owner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mijugavagi.epizy.com/sd355_cut_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/demonic_gorilla_guide_osrs_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/xugetujusugazaveman.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/55725469487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a8fb3c-445b-4d26-9ca1-dddd0903bbd0/what_is_the_power_of_media_and_information_to_affect_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67b53d9-9ef1-442f-9d7a-f5ab1a4f93b6/altec_lansing_life_jacket_2_pairing_mode.pdfIn PDF document text
    • http://luselobek.epizy.com/wovokodunofa.pdfIn PDF document text
    • http://rakulewozagax.rf.gd/17366615164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7409293d-2533-463b-a610-957288d5f6a6/head_first_java_code_magnets.pdfIn PDF document text
    • http://redusaboj.epizy.com/siwitejupafetu.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/gloomhaven_scoundrel_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a21d4c-36f3-46e6-83f1-8415b3877d27/how_to_write_a_case_report_reddit.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_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 5212 bytes
SHA-256: 685c5460c0d864b24e8224073a244558b7596bedee2afc7663bb7d6b23210101
font_01_sfnt_off000103ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 10512 bytes
SHA-256: d5317ee7a8aedc19ca01b228de0dc701ec456fa10e20c6e6b1af938c93bd56bf

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