Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fcb1393043386d…

MALICIOUS

PDF

78.8 KB Created: 2021-03-02 22:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 804edb07f53af09f340908ddef24ea37 SHA-1: 14f3c43831f16aed6fa3a76381e4834e4c71a2a5 SHA-256: 38fcb1393043386d93973a1a8d434270ca277051ce0ef850ce42a47064be69cd
126 Risk Score

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, likely phishing or malware distribution. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=kenmore+series+700+washer+manual PDF link annotation
    • http://jixewelo.scienceontheweb.net/divergent_2_download_sub_indo.pdfIn PDF document text
    • https://cdn.sqhk.co/jivapereb/ojhiiKY/mirrors_lyrics_arrested_youth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374374/normal_5fe4296a99314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_602a8a64736e8.pdfIn PDF document text
    • https://cdn.sqhk.co/wetaxawirewu/D0kicyQ/legends_of_runeterra_teemo_deck_import.pdfIn PDF document text
    • http://idealica-ituficiale.website/custom_sound_button_appgrm1j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376629/normal_5fce90bf9dce8.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/jgThjzl/most_popular_ringtones_list_2020.pdfIn PDF document text
    • http://sesopob.iblogger.org/bemok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_60394c1cb0183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_601753b133eb1.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/does_tricare_reserve_select_cover_pregnancy.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/nomovelivubiwevala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5ffdd44236552.pdfIn PDF document text
    • http://tricitysikhs.com/wejijibikomegelanejobi8pyx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_6023365e21999.pdfIn PDF document text
    • http://tersq.fun/zunuxe8f1z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fojepik.epizy.com/33773605995.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/20530589482.pdfIn PDF document text
    • http://somekifizepu.epizy.com/patterns_of_world_history_volume_two_from_1400_with_sources.pdfIn PDF document text
    • http://lubozudaxik.epizy.com/tcu_undergraduate_guide_book_2018_19.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB18 5008 bytes
SHA-256: 61be07e33d1a9b835f51a647be5b4aeb5b6529e4a3bcfb8df49cafe1ab3c20ce
font_01_sfnt_off0000fbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 10560 bytes
SHA-256: b1c579698d79ce214f458377eea6929845a81784cfdecf4e12a260b06215f468
font_02_sfnt_off00011f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F93 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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