Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8c36427841407d…

MALICIOUS

PDF

78.0 KB Created: 2021-02-27 08:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 64f9caf4ce4ec34085faf8abeebce8fa SHA-1: e535b83585e40e8a47511ff5af635d5bffa6f2d4 SHA-256: 4d8c36427841407d9c08c7bdf0a2cf048eb04a20816bfbb3d847bf99363dab5b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/aws?utm_term=discovering+our+past+a+history+of+the+world+early+ages In PDF document text
    • https://static.s123-cdn-static.com/uploads/4386824/normal_60014c96be1fe.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/photographic_composition_rule_of_thirds.pdfIn PDF document text
    • http://yachts-4-sale.com/64106978448bi8bg.pdfIn PDF document text
    • http://getcreditcheck.info/94074066704at3ek.pdfIn PDF document text
    • http://terugate.mypressonline.com/mixekap.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/phonetic_alphabet_military_slang.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/29950773094kvlqf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_6020d0abbb486.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/jYnhhQt/canon_print_inkjet_selphy_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483854/normal_602168166f323.pdfIn PDF document text
    • http://bostpolamos.site/covet_fashion_dress_up_game_for_pcryzf2.pdfIn PDF document text
    • http://prostosite.site/physio_appendicular_skeleton_the_upper_limb_answers8hnkl.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/FjeTidl/stickers_whatsapp_memes_mexicanos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kefixofelapadi.epizy.com/cashing_out_annual_leave_letter_template.pdfIn PDF document text
    • http://jinegudizoropi.rf.gd/44827682126.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_off0000f368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 5668 bytes
SHA-256: 21b5cbb43305eb08a79ef3bc987607cc76379295889386dcf8f334a3194830fb
font_01_sfnt_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 10556 bytes
SHA-256: 964e8ceada1cb88b406ccd10082ea05a51a458c44149aee73c3c4acee335e423