Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e315136bc71a55…

MALICIOUS

PDF

70.6 KB Created: 2021-04-01 09:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fb554809a0d98f66dfd3542b6eb6b376 SHA-1: fe9fb388a2c72a25e5e3b6ff2124df1719b3cdbe SHA-256: 05e315136bc71a55b2cbdc6fd4958ca9248ee32e3f8521d6b3f4857568d2d302
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 and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wix?keyword=philips+magnavox+az1010+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448094/normal_605b7457aacd0.pdfIn PDF document text
    • http://myfirstsite.xyz/football_manager_2020_touch_switch_cheatsiwa1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_6056f0b39b139.pdfIn PDF document text
    • http://003-center.ru/what_is_a_program_counter_registerja30v.pdfIn PDF document text
    • http://triple-doska3.club/40408645248ufvpa.pdfIn PDF document text
    • http://gamedv.design/smok_nord_instruction_manualoqtal.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/gisadegof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_606532d057d73.pdfIn PDF document text
    • http://barashik.space/wofiwabatubijixfm6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_601c626ed5f86.pdfIn PDF document text
    • http://reduslim-italy.site/school_management_system_with_php_open_source_projectcgm8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491173/normal_6008a666681d3.pdfIn PDF document text
    • http://options.expert/chuff_chart_spreadsheet40okm.pdfIn PDF document text
    • http://parrrtner.xyz/7532964654nk55f.pdfIn PDF document text
    • http://rivalo130.com/how_do_you_use_a_cen_tech_battery_chargeryrskt.pdfIn PDF document text
    • http://totalcreditcheck.info/the_astonishing_power_of_emotions_free_ebookbhsz3.pdfIn PDF document text
    • http://espaceabonne.com/dosojetozixefetarepudugw5rs.pdfIn PDF document text
    • http://fakaripeti.xyz/69537614840ptey2.pdfIn PDF document text
    • http://cheapkeys.site/gezazujokezimukito60r9a.pdfIn PDF document text
    • http://italywom.space/73086867650bk8ge.pdfIn PDF document text
    • http://rowefuzoj.mygamesonline.org/how_to_use_viewer_in_jio_phone_telugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_78a12a69b80f462d91599ca7c3e92a87.pdf?index=trueIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_ed34f526e0f84b70879ab9083b2f0c08.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_6bfea1efab5a42b48f16d100a14cae9a.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_5f69ffccb4214f0298fd8c03615d6b3c.pdf?index=trueIn 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_off0000d103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD103 5512 bytes
SHA-256: 6e7b4b33e37c8607075a20d86d473e52be5745502ee7cc2c87199ac4968a867f
font_01_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 13080 bytes
SHA-256: 7c50967d281b65dbe2fa6431f031e74dd578597bac987ea8a2d622c05c2416e1

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