Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee6c1f1d5338a3f…

MALICIOUS

PDF

72.5 KB Created: 2021-02-11 07:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6b71bb64b998b73126a6fd1e24ed8a48 SHA-1: dd38962422a686aafff543b20155fdd4898e66f4 SHA-256: 8ee6c1f1d5338a3fb4c3bc750d62694a75b37b6ae52ade2f9869dfd83893b9d0
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, suggesting a malicious intent to redirect users. The 'SE_DOWNLOAD_BUTTON' heuristic indicates a deceptive call-to-action, likely to trick users into downloading a payload. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/aws?utm_term=belluccia+stylistic+font+free PDF link annotation
    • http://linza.media/ponavowirjdwi0.pdfIn PDF document text
    • https://dodezugufiz.weebly.com/uploads/1/3/5/3/135331092/wenep-jewopud-tumifuxazarup-mizuvevesu.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/iNieTii/jakivuje.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/gopize.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/idijWU8/civil_emergency_warning_near_me.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/volos_guide_to_everythingmjm5p.pdfIn PDF document text
    • https://pomulopegodetom.weebly.com/uploads/1/3/1/3/131384256/xibulu.pdfIn PDF document text
    • http://burasiwe.22web.org/clock_half_hour_worksheet.pdfIn PDF document text
    • http://flylovel.com/87164805065snbo7.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/jjierid/luzujosedorew.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/ggjejiZ/teachers_union_california_propositions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vabanenutulaki.rf.gd/memifatotazatudafuko.pdfIn PDF document text
    • http://ziboporo.epizy.com/17324762964.pdfIn PDF document text
    • http://tiviluxesegod.rf.gd/98592383881.pdfIn PDF document text
    • http://besipobewawite.rf.gd/camp_rock_soundtrack_free.pdfIn PDF document text
    • http://wegatanubuguze.rf.gd/secret_love_song_piano_sheet_music.pdfIn PDF document text
    • http://desixomagi.epizy.com/cheap_carfax_report_sulekha.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_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 5024 bytes
SHA-256: 13365df97b6f75b31bf69c9ef3a4107b936bf547b45a7270dd546aaa62c08eb0
font_01_sfnt_off0000f0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BD 10820 bytes
SHA-256: ef3d8d6bf186a1e7eeed5629c43e559c9e5770540c1c5e4d3f1b0b357e0f01ec

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