Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1585a00f5293d1c…

MALICIOUS

PDF

69.0 KB Created: 2021-02-27 18:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ed1a0fe74e758282ffe3d1931dd5190f SHA-1: 5cacb857be994fc3698bf3235ba1f0423b97a3a0 SHA-256: f1585a00f5293d1cf1e31ebc731a62a130d85c0a7957600ff36d3afb524b1e4b
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://dafemum.ru/award?keyword=how+to+set+analog+time+on+casio+illuminator In PDF document text
    • https://cdn.sqhk.co/xororofomed/QL9hbMp/99182439907.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/hbgfXji/restaurant_halloween_salon_de_provence_breda.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/ifhfULl/download_apk_rec_screen_recorder_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/jghjcxl/momisubifoputo.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/Fieibha/bombay_cat_litter_size.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/edibgcK/monster_inc_craft_ideas.pdfIn PDF document text
    • http://wugafis.66ghz.com/38821979273.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/aGjgzgd/warriors_rumors_nba.pdfIn PDF document text
    • https://bowixasexagat.weebly.com/uploads/1/3/4/0/134041419/zagidibelupepetuketo.pdfIn PDF document text
    • http://kogawanitikip.iblogger.org/zujigebe.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/2GhjfUo/supernatural_sweethearts_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/jiwjdhf/detasejijimobujamesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keguwaburafokul.epizy.com/pejefidazit.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/87595164452.pdfIn PDF document text
    • http://mofodozudejafej.rf.gd/bekhayali_song_mp4_mr_jatt.pdfIn PDF document text
    • http://nokenamepewu.epizy.com/panufenidodogadilenigox.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/allianz_insurance_claim_form_health.pdfIn PDF document text
    • http://dodixuvizovov.epizy.com/como_utilizar_el_libro_azul.pdfIn PDF document text
    • http://lavovexerok.epizy.com/56545049664.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_off0000d544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD544 5172 bytes
SHA-256: 44c090f484cef15fb34eebec4df509a01ed1d7fab2d6895c8598821d634b37a2
font_01_sfnt_off0000e6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D9 9188 bytes
SHA-256: 64163cb9f97a77d26c146fa7048a92edb6054596ae55fccfed212ac60eaa90c0