Malicious PDF — malware analysis report

Static analysis result for SHA-256 028e026e1f3935e8…

MALICIOUS

PDF

76.7 KB Created: 2021-03-25 14:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9db189cd62f31dd6ba8058bbd4c2cd8e SHA-1: b8ad3a5b07ceba4209e710d6e370f27e4daabbf9 SHA-256: 028e026e1f3935e8c43c2e99b874fea087d74e0eccb2fcac22ba6917b7898dfa
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • 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://seumenha.ru/strik?utm_term=honeywell+1300g+scanner
    • http://larijasetejupaz.mypressonline.com/51827658759.pdf
    • http://sadipize.scienceontheweb.net/bonafide_student_certificate_format.pdf
    • http://juxowupekabaf.mygamesonline.org/fakuriladedulet.pdf
    • https://xaniwunedevivat.weebly.com/uploads/1/3/4/4/134470123/3da21fb.pdf
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5fd2ce3bae241.pdf
    • http://tozofuji.scienceontheweb.net/when_do_the_us_stock_markets_close_today.pdf
    • http://figimumagoko.mygamesonline.org/4142194191.pdf
    • https://ligexuvuzi.weebly.com/uploads/1/3/0/8/130814340/gojux.pdf
    • https://nanagimub.weebly.com/uploads/1/3/4/6/134632235/7795132.pdf
    • https://static.s123-cdn-static.com/uploads/4388282/normal_5feb2582b9998.pdf
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/3411185.pdf
    • https://cdn-cms.f-static.net/uploads/4408865/normal_601bfaef9863d.pdf
    • https://static.s123-cdn-static.com/uploads/4467581/normal_600337c6b3392.pdf
    • https://pepedojimu.weebly.com/uploads/1/3/1/0/131069997/sakaxutomi.pdf
    • https://cdn-cms.f-static.net/uploads/4391921/normal_602ff8168b61a.pdf
    • https://kaseloguxov.weebly.com/uploads/1/3/1/4/131406527/6076745.pdf
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/rodoj-jofodujikufe-lejof.pdf
    • https://menuvinowit.weebly.com/uploads/1/3/5/3/135320060/nibajezusanemir-tumejuvukudum.pdf
    • http://sepukolobu.sportsontheweb.net/how_to_prepare_for_cultural_interview.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jujageritoxo.atwebpages.com/noxolotudop.pdf
    • http://limoxukuk.atwebpages.com/how_to_stop_first_alert_alarm_from_chirping.pdf
    • http://kexomun.myartsonline.com/embryology_book.pdf
    • http://sodowurivav.onlinewebshop.net/ge_true_temp_range_oven_handle.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a3.bin
7b2e4523d642ec486c9d55ce883289937ebe65e0ac02503a43121d7f9e032c5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A3 4248 bytes
font_01_sfnt_off0000dfb2.bin
2f836ca263457f555255dbad0f8c518cb7266e247669e5c8d2332828a4aaab44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 5140 bytes
font_02_sfnt_off0000f142.bin
b81dd85325e1cb8d73db4c4e915d99334fc2eaf2b2c4e1ea1c620135470e4331		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 11184 bytes
font_03_sfnt_off00011577.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 4324 bytes

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