Malicious PDF — malware analysis report

Static analysis result for SHA-256 08475c92f0a28a52…

MALICIOUS

PDF

88.0 KB Created: 2021-03-18 03:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5baa2649ee7fe81bae51e0f71cc1bb7a SHA-1: 171709ff4ba23781a38518626b9c3707126b2c64 SHA-256: 08475c92f0a28a529844dc3dadcf8d24d0a9ba23a9cb40ddc325ec24cc9bbf9e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URL 'https://seumenha.ru/strik?utm_term=where+is+the+wave+located+in+utah' and the presence of numerous other PDF links indicate a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=where+is+the+wave+located+in+utah PDF link annotation
    • https://cdn.sqhk.co/vujagefamig/thirijC/screen_stream_mirroring_pro_apk_mod.pdfIn PDF document text
    • http://ig-copyrightnotice.com/vigisovumuxevevijc8jt2.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/morexekazubijofowomoru.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/fgZeXhc/drum_machine_software_free_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/S7hhhf7/dream_score_soccer_champion_apk.pdfIn PDF document text
    • http://samelike.site/bengali_romantic_quotesqdigw.pdfIn PDF document text
    • http://liketsven.xyz/353139518601ik9s.pdfIn PDF document text
    • http://doordash.link/python_dictionary_pop_popitembmhrk.pdfIn PDF document text
    • https://cdn.sqhk.co/bujugasefoli/egfijeF/37999820685.pdfIn PDF document text
    • http://idealsit.space/bass_booster_pro_apkpured3dk0.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/falaxakapud.pdfIn PDF document text
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/visipunilasuxaf.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/f53517971b9d2ea.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/xheg2if/volvo_treasury_ab_annual_report.pdfIn PDF document text
    • http://vowipeg.iblogger.org/pdf_abnormalitas_spermatozoa.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/BicVib0/99691744958.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/18542154978.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/cjfheic/snakes_on_a_plane_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/hiezBhi/polandball_amino_app.pdfIn PDF document text
    • http://vabadikukopi.iblogger.org/savaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikimiwuwal.myartsonline.com/89599083986.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/did_light_die_at_the_end_of_death_note_movie.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_off0001197a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197A 5192 bytes
SHA-256: 3052611e08b547070ff3e5848c5e35b553d1b7ef2386a960b87811c925189952
font_01_sfnt_off00012b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B37 11568 bytes
SHA-256: 0fe238970e643d23022e835dcc60609fa08b35608b29e190bb30db47680dfe6a