Malicious PDF — malware analysis report

Static analysis result for SHA-256 caad5064fe9e59ea…

MALICIOUS

PDF

66.7 KB Created: 2021-04-10 15:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 5efb7aed8475613aee91aeaf982ff673 SHA-1: 73c331003ff6a259c905a5ba3b1d23367a44b6da SHA-256: caad5064fe9e59ea7d1129c76859e3909c5c5b3ea6a4b0752058746fb02513ad
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the document's structure and URL distribution suggest it's designed to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=duromax+4400+hybrid+generator+manual PDF link annotation
    • http://xolabakagiraw.iblogger.org/34120187624.pdfIn PDF document text
    • http://vanlit.ru/best_stock_markets_to_invest_in_20202nskv.pdfIn PDF document text
    • http://gta-msk.ru/fituwoxogupenewurijuiuksn.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/65963620265.pdfIn PDF document text
    • http://glawerry.online/introduction_to_machine_learning_with_python_a_guide_for_data_scientists_freew9s5x.pdfIn PDF document text
    • http://eeuuurrrrr.space/vivinefuprg8x.pdfIn PDF document text
    • http://nubupexajed.iblogger.org/takeuchi_tb240_manual.pdfIn PDF document text
    • http://lighterusb24.site/kijokovegumisoxakagafi61ywx.pdfIn PDF document text
    • http://fimunukowira.iblogger.org/xedikituzanolumimafebaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://motuvemulavoko.epizy.com/salesforce_rest_api_documentation.pdfIn PDF document text
    • http://damedosa.rf.gd/xoxilokiku.pdfIn PDF document text
    • http://desejiboferade.rf.gd/the_story_of_an_hour_full_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9998505e-a7ea-4374-969e-3941a6dc15a8/where_can_i_buy_womens_nike_air_force_1.pdfIn PDF document text
    • http://mizoxojado.epizy.com/vodigademawolawol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd032eb8-c0b2-411e-9ccd-6c191103a9e7/56748505398.pdfIn PDF document text
    • http://goderitufonodaz.rf.gd/wheres_waldo_3000_piece_puzzle.pdfIn PDF document text
    • http://sexizaju.rf.gd/3056805810.pdfIn PDF document text
    • http://puwiliguso.rf.gd/43017018256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9572be0-efc4-40be-b082-e83f4c17c558/73797203641.pdfIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_9c4a5f3209f94f99879b2c9fb7598e12.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_983a8da7d3294e9e970b47e8b5293d92.pdf?index=trueIn PDF document text
    • http://xowirife.rf.gd/62623978579.pdfIn PDF document text
    • http://bemujamo.rf.gd/microcytic_anemia_nejm.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_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 5600 bytes
SHA-256: 526286e393d4fd1881df2eecb0b6615cd7d63cadb1b4b6acb5d1977ce7ebb743
font_01_sfnt_off0000db30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB30 10028 bytes
SHA-256: bd9fdb8ae89cf3e533c57b2ea42b529fa84e9bef8e8a14bc0e916bf71559a7e0

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