Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84f492a30547941…

MALICIOUS

PDF

71.8 KB Created: 2021-02-26 22:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 472f8bec84db60bd5aebdd1c0376d750 SHA-1: 0bf7f661e10bf743d09c7df1ff788e800ff212d5 SHA-256: f84f492a305479411017a119dfbe8d612a2c240b2cc59dcba6bdcb6c6de4f9cd
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://yafferge.ru/123?utm_term=interior+design+schools+online+fast In PDF document text
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/zilabaxebug-rimatinadi-puginus.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/jbifjjb/music_volume_equalizer_pro.pdfIn PDF document text
    • http://lomizagin.iblogger.org/xibexelifibitaji.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/8061637756.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/Didhcwy/xuponal.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/4hcidhg/amazon_assistant_store_manager_jobs.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/72542372641.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/r_programming_for_data_science_amazon.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/4727169.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/04acda157e.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/punijivofemevo.pdfIn PDF document text
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/b836bb79376b6e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zamituzok.rf.gd/bancharamer_bagan_bari_full_movie.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/casio_fx-300es_plus_graphing.pdfIn PDF document text
    • http://bikizituluvu.epizy.com/93151819659.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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 5220 bytes
SHA-256: c3dabb0b4d45a4981f6dfc4c3c152f70eb1a9d927109e4718cfb51bc776a37c0
font_01_sfnt_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 11104 bytes
SHA-256: b8b3e2b806d29005017c2ed4fa8b5d494f21839a1266ab8d4fbe1396626b3638