Malicious PDF — malware analysis report

Static analysis result for SHA-256 181540f5a29d8155…

MALICIOUS

PDF

79.7 KB Created: 2021-03-07 17:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 19d5694b0ee75906217dedabe107649a SHA-1: 8b25633e7d8e5a6f6566713a60fec31bb1aa8c42 SHA-256: 181540f5a29d81558e2c36df7b8e0d822e3ff26a5a524c3eb0eade3e13aaab93
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+anoint+oil+poe In PDF document text
    • http://mimivamefigupe.sportsontheweb.net/nowunixevezigevudotab.pdfIn PDF document text
    • https://cdn.sqhk.co/furikute/4jgjfhd/tebajuwudu.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/b3KXmvf/best_90s_dance_anthems.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/50705441662.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/how_to_setup_scan_on_hp_officejet_pro_8620.pdfIn PDF document text
    • http://samudexifogiva.22web.org/fezilaro.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/PrgihjL/kitopikoviti.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/Xjx94T2/flip_master_game_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471988/normal_600b9ba9c4e1d.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/spice_and_wolf_ending_song_name.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/hhI4Khh/modern_age_president_simulator_premium_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5fd5f7376dcdd.pdfIn PDF document text
    • http://zupanito.iblogger.org/nologigolon.pdfIn PDF document text
    • http://radulukolataleb.iblogger.org/96581680686.pdfIn PDF document text
    • http://mebowakop.22web.org/blackstar_id_core_beam_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_6030873a80686.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/jf1OhgK/standoff_2_pc_download_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/toralapiluw/Sxj0mB0/remejopufeboragejikomuge.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/7xgjX6o/meziminiruzototuxoturubik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/brooklinen_luxe_core_sheets.pdfIn PDF document text
    • http://rujavesejijoram.epizy.com/lawn_boy_320e_snowblower_carburetor.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/how_do_i_setup_my_mi_wireless_router_as_a_repeater.pdfIn PDF document text
    • http://mawokale.myartsonline.com/how_to_teach_main_idea_4th_grade.pdfIn PDF document text
    • http://faxumev.epizy.com/acknowledgement_legal_form.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_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 4592 bytes
SHA-256: 7a2807cb325b82d039998e6754beb72cdd9a9bcf962038f75dd06e787bc1f1f7
font_01_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 11576 bytes
SHA-256: 38c1bc022578fe49b2d92ef2cad6025215fb2344e79a6a64158ed6545dd8eb33

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