Malicious PDF — malware analysis report

Static analysis result for SHA-256 965563556a6cd931…

MALICIOUS

PDF

71.4 KB Created: 2021-03-01 17:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c7d28549669f856eeed5a7f2ed6111b9 SHA-1: e8aeaa902e1f6ec7fc8be54f5b5bcc838b706eaa SHA-256: 965563556a6cd931e1146c591ca94bbd1ea5a5b9764e2c09c8a1e0aa7714583d
186 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
  • 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://xajibur.ru/wix?keyword=unit+4+worksheet+2+chemistry+answers PDF link annotation
    • https://cdn.sqhk.co/xaxovowupofa/evjergc/11830674541.pdfIn PDF document text
    • https://detalejutapebis.weebly.com/uploads/1/3/4/6/134610814/zomalanofef-zonigu.pdfIn PDF document text
    • https://wozedekasejop.weebly.com/uploads/1/3/4/7/134703393/mukobuwubiriwexo.pdfIn PDF document text
    • https://rifojiditesi.weebly.com/uploads/1/3/1/3/131379396/wubejigixalera-tegunirudoruve.pdfIn PDF document text
    • https://cdn.sqhk.co/pidenali/pFjgTtW/box_office_records_all_time_wiki.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/7979290.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/gihjhah/abba_greatest_hits_album_download.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/4221050.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/1d899be0fa00f8a.pdfIn PDF document text
    • https://fazizutedo.weebly.com/uploads/1/3/4/7/134768054/ee3424b1.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/sukululibeze.pdfIn PDF document text
    • https://bokupotanija.weebly.com/uploads/1/3/5/9/135995636/7435a5fc0d300.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/jeggNwH/40527511466.pdfIn PDF document text
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/3c79f3db64e.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/jd4jhH8/dovegiwerupasuv.pdfIn PDF document text
    • https://nigukaxo.weebly.com/uploads/1/3/1/4/131453065/9071001.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/Kgcjgu7/minecraft_mini_game_cops_n_robbers.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/gjiDghe/kukelovevis.pdfIn PDF document text
    • https://segoponozumi.weebly.com/uploads/1/3/4/0/134000249/gemifiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97F 5476 bytes
SHA-256: 4cd195eeea4a4add8ea6d2e756cfb8a63950d776cf810c5452e87253b89ccd67
font_01_sfnt_off0000ec16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 10732 bytes
SHA-256: ff7a7718a07955b51b06807b814b78262c0ea5bd9de00f9d5c1e032bae3793f7

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