Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a0905108b5fe03…

MALICIOUS

PDF

69.5 KB Created: 2021-03-03 13:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 59a1eee398a3cef48741e02065756b21 SHA-1: 8b28e8b9fad27b6015f7a38a6c8f35bcc377278f SHA-256: 86a0905108b5fe032ae7d83d3acec6c73f08d2980ac7a3533a930a5f129ea4cf
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://crophysi.ru/wix?keyword=minecraft+0.15.0+apk+mod In PDF document text
    • https://narobukedezupe.weebly.com/uploads/1/3/0/7/130738621/9303c9f393aa8b6.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/jbJhbhh/19337660255.pdfIn PDF document text
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/7829575.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/rBcifx2/55730151224.pdfIn PDF document text
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/21d723.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/dab6de0cf8df.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/ggeicje/kawuwulaxug.pdfIn PDF document text
    • https://cdn.sqhk.co/jagawubu/ehihcgy/69949568851.pdfIn PDF document text
    • http://devgm.design/angioedema_tratamentokhngv.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/UN4tjgA/my_first_piano_adventures_book_c.pdfIn PDF document text
    • https://tunorikiwevog.weebly.com/uploads/1/3/4/0/134097136/samojagivineza-kuzinufokozuwe-vetij-ledal.pdfIn PDF document text
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/gewekoxaranoxubi.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/fVybjaG/hovercraft_takedown_multiplayer.pdfIn PDF document text
    • http://limons.space/nogilaknfol.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/eBEfNij/79387362965.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/ha2if8F/football_schedule_2020-_21.pdfIn PDF document text
    • https://pezomivagijo.weebly.com/uploads/1/3/5/3/135392772/cdb5ac9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fanuzisi.epizy.com/bhai_cha_birthday_song_free.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_off0000d39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39E 5512 bytes
SHA-256: 4c12d8d26e2afe515e8102611f13c54f1c298d716fad995ec52d321f8ade6dd9
font_01_sfnt_off0000e66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66A 10180 bytes
SHA-256: 92e0ace5a7b481c2167803881ee1c12c8d9054e0ede377abfdf51a002574b0c7

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