Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd407eee0d16543e…

MALICIOUS

PDF

76.1 KB Created: 2021-03-13 18:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daae22f3354f359968078846b086c3ac SHA-1: 16bd34e77ad60a0b73dacdb970abb7f012f6e46a SHA-256: bd407eee0d16543e25907faad4d28950427e4c6a6bafa50c211600d8fb2aa20a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains and Weebly-hosted PDFs, indicating a link farm or phishing lure. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for SEO manipulation or to host phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+adjust+kenneth+cole+reaction+watch
    • https://kuwovuvonix.weebly.com/uploads/1/3/5/9/135971109/514bc60995448.pdf
    • https://rotaxavevun.weebly.com/uploads/1/3/4/8/134884867/8083210.pdf
    • https://xurobogi.weebly.com/uploads/1/3/1/1/131163732/kenedaso.pdf
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/a5503.pdf
    • https://zeloruzo.weebly.com/uploads/1/3/5/3/135349371/5553258.pdf
    • https://burakizu.weebly.com/uploads/1/3/1/0/131070688/sekunidokutixug.pdf
    • http://sallles.ru/tekefusitobaruvobny.pdf
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/305849.pdf
    • http://azorocheat6.xyz/15759125754kwef6.pdf
    • http://agentsoft.space/stained_glass_window_slope_worksheet7yf78.pdf
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/cc1af39b6a.pdf
    • http://immorta-cross1.club/vivaldi_summer_presto_piano_sheet_mup2ryh.pdf
    • http://uscovidcharts.com/18823735681llp65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_b505037844d14818b38fc673c4fb61e8.pdf?index=true
    • https://s3.amazonaws.com/vatakefojunib/let_s_talk_about_family_worksheet.pdf
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_1fb8922652544625a395075024edd6c0.pdf?index=true
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_2f84eae40e5843e583fd6d48e47468b9.pdf?index=true
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_c33a08f7dd4141d687bcccbae7515eab.pdf?index=true
    • https://s3.amazonaws.com/kelageketisefuv/81987862680.pdf
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_bce38a15edc444b89e1abeafbf0b7f2c.pdf?index=true
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_54f42c5a9d254c7f8980e76636a9fe71.pdf?index=true
    • https://435a888a-8f80-410d-aa77-77edd6e4491d.filesusr.com/ugd/51fec0_e594e339788845da8e220ae864a09339.pdf?index=true
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_248d06eefe124c49a9a6360d59c70ff2.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6a.bin
c91e70b02ac59273525cfd36365979b1d4c20ffb22ccfb6f654e3ffb463c3669		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 5220 bytes
font_01_sfnt_off0000ff35.bin
33b2fca617f6c58bbec8bb69456b4fb73600cb0c02f0903e5e2023e2c897bd0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 10424 bytes

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