Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d70350fd48afc8…

MALICIOUS

PDF

85.9 KB Created: 2021-04-01 14:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b87af7a5010ae36f53266221edd946c4 SHA-1: 22184e07240ed0e95abc9bddb265e28aa8b14723 SHA-256: 32d70350fd48afc895bb1ffc3f5376a480442a6efec7949a9fc9c3948abb3756
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=terry+pratchett+quotes+hope PDF link annotation
    • http://govnosiakxws.online/the_bluest_eye_summary_chapter_1uzu4i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_6021c7e266186.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/carbohydrates_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/jb1g6ic/kusawixupuxedewaxavop.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/pofilakabagasazizez.pdfIn PDF document text
    • http://gbo.guru/918401989775q31q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6015a8b208584.pdfIn PDF document text
    • http://ompala.store/simple_english_grammar_for_beginners9nso4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_605968ae139c2.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/hjhiiad/mebugunamodedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_5fe435b0d8e1c.pdfIn PDF document text
    • https://cdn.sqhk.co/baziwuwe/3vgftvd/bamatozawivodagudizibe.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/d0ihihn/classlink_fulton_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fd16e643b736.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/84715424905.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/BBichhe/to_do_calendar_planner_for_windows.pdfIn PDF document text
    • http://nuveclovet.xyz/tazemixikakb1q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386366/normal_5fff0ea73f843.pdfIn PDF document text
    • http://qunit.space/2498737175076gih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fddd3a398b30.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_off000112c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C4 5168 bytes
SHA-256: ab01ed6470fd596cfa08f1ed35a94faf242107c29d4607a8348357da2821dd0d
font_01_sfnt_off0001245b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245B 10832 bytes
SHA-256: e8f4296432ed48e2cb8bd3d28e6ee6ce9ab949324e0cfc1f4afbea3b90210ab5

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