Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a694f311d87d29…

MALICIOUS

PDF

80.1 KB Created: 2021-04-03 04:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 42fbbcfa26996901b978743f82c48b8e SHA-1: 436924fde7872ee83adcc41529857dc4feba9599 SHA-256: 22a694f311d87d297758693d4f7dbe5bc80cb431e8d7bedb1271006fbfe77ade
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The presence of external URIs and the 'ML_NYX_PDF_MALICIOUS' heuristic suggest the document's primary purpose is to redirect users to potentially harmful sites.

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://jacksth.ru/wix?keyword=feather+token+5e+eberron PDF link annotation
    • http://uspehdnyaaxyz.xyz/43120365964k6vnu.pdfIn PDF document text
    • http://woviregawafokal.22web.org/kijinuxile.pdfIn PDF document text
    • http://igcopyrightclient.com/raxenusakelalevu5kzxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_605efa3b9179c.pdfIn PDF document text
    • http://gprofights.ru/nickelodeon_resort_mexico527jm.pdfIn PDF document text
    • https://meligobuv.weebly.com/uploads/1/3/1/0/131070858/399822.pdfIn PDF document text
    • https://taxurazuzar.weebly.com/uploads/1/3/4/0/134042721/mudubozax_lilosejutepaxof_maxikanexumavo_xakufezukipivat.pdfIn PDF document text
    • http://infokurs.design/runesipodasirefujebogcwhtg.pdfIn PDF document text
    • http://hangzhoumetal.ru/98528792280k7ltz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_60432a25e1e72.pdfIn PDF document text
    • http://kinoogf.space/navy_command_and_codesz9lrc.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/takebupuxoxivatixopima29536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_60125f5de20de.pdfIn PDF document text
    • https://rutuwupu.weebly.com/uploads/1/3/1/3/131378820/8187254.pdfIn PDF document text
    • http://premial.su/cash_voucher_format_in_excel_free5yrhr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sufelubunat.epizy.com/best_android_games_2018_ign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cb0646-de5d-4840-9008-c114ffcb6546/what_is_the_best_electric_leaf_blower_for_the_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a455ac7-82db-4f1d-b965-af73425f2465/58095241462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479288f9-f6da-4c45-b43f-ad20d1dbab3f/how_to_get_free_fortnite_codes_ps4.pdfIn PDF document text
    • http://fudipakuvile.epizy.com/old_age_pension_application_form_tamilnadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ef4b4-5430-4c8b-b6d2-1b00811d858a/world_political_map_outline_free_download.pdfIn PDF document text
    • http://dixuzudes.epizy.com/financial_literacy_unit_1_test_answers.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_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 4848 bytes
SHA-256: 054b2c516a0224fe55f15e19d121adb76041b37198d69e00782c2a897a389ba4
font_01_sfnt_off00010ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFE 10484 bytes
SHA-256: f412406ecc0cc1fb2052c03af370898ab7b3337995efd0051f67fc0b37766162

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