Malicious PDF — malware analysis report

Static analysis result for SHA-256 8704d35ae36db1ff…

MALICIOUS

PDF

76.3 KB Created: 2021-05-10 20:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 260df1b51c9a9c56ad829c7215908940 SHA-1: 2e3c0d1923a1c931b7fc7138458817d67d776288 SHA-256: 8704d35ae36db1ffa513f59801d86b3f0f9b8fe51e496840a17a8f6a80d075fe
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 hosting, and a primary URL that appears to be a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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
  • 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/strik?utm_term=do+honeywell+electronic+air+cleaners+work PDF link annotation
    • http://kukikifo.iblogger.org/ultrasound_falciform_ligament.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/3gwehhc/punokafexe.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/eqhdJje/two_points_that_are_non_collinear_figure.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/the_different_aspects_of_islamic_culture_unesco.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/GjgXhch/clock_face_with_hands_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/fSSkifs/penerixixutuzoladi.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/naper.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/pubefimutug.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/dGRjacX/guxusurotolafozirupejit.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/bob_stroller_revolution_flex_2.0_vs_3.0.pdfIn PDF document text
    • http://nuxulaxidiga.iblogger.org/guzoxiputo.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/nISif13/rare_sanskrit_baby_boy_names_with_meaning.pdfIn PDF document text
    • http://favarivizuna.medianewsonline.com/encyclopedia_judaica_vol_2.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/g2JXDgc/ring_chime_pro_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widurema.epizy.com/barakhadi_in_english_chart_filetype.pdfIn PDF document text
    • http://budapetag.epizy.com/sogogalominovudin.pdfIn PDF document text
    • http://mubomapobe.epizy.com/graco_nautilus_65_3-in-1_booster_car_seat_with_safety_surround.pdfIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/candidiase_masculina_tratamento.pdfIn PDF document text
    • http://lajobeg.epizy.com/acta_de_constitucin_de_proyecto.pdfIn PDF document text
    • http://tefixifurelo.epizy.com/68822049027.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/circuit_board_symbols.pdfIn PDF document text
    • http://datadeb.epizy.com/22807458143.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/fewopogol.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_off0000ebc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC2 5144 bytes
SHA-256: 2307b204015536ecca70a572ba8026bd757bad68300477065fb39c3091b8018e
font_01_sfnt_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 11240 bytes
SHA-256: 98b2522e6047083a0b3478f25f8e701dd3f90a8f9e81221071aa351c7f0c9925

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