Malicious PDF — malware analysis report

Static analysis result for SHA-256 058236cc53b41436…

MALICIOUS

PDF

71.6 KB Created: 2021-03-25 06:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff4b7643582a8fd84d80c630c78dfb23 SHA-1: 2eb5724e8052b4be40f16ecd29bda72e8a56205c SHA-256: 058236cc53b414368904c42e774edde56d0f22a7607ea9b09f5cec2caf5d2c19
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful websites.

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://leonvi.ru/wix?keyword=msp+manual+chapter+1
    • http://mufikisa.22web.org/ipl_trumpet_music.pdf
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fceff132011d.pdf
    • http://hrushch.space/47283259764zjrkd.pdf
    • https://static.s123-cdn-static.com/uploads/4393754/normal_5fde87460addc.pdf
    • http://meroxisawifagu.mygamesonline.org/who_constituted_the_third_estate_of_france.pdf
    • https://cdn-cms.f-static.net/uploads/4421940/normal_60407b5d12474.pdf
    • http://dosijefa.mypressonline.com/australia_visa_form.pdf
    • http://wssummer.space/acdc_highway_to_hellhlmdf.pdf
    • http://bonifacy.site/how_to_generate_tax_free_incomehlss5.pdf
    • https://cdn-cms.f-static.net/uploads/4473616/normal_604a5f6f09e14.pdf
    • http://lomigakorak.getenjoyment.net/how_do_i_clean_my_lg_inverter_direct_drive_top_load_washer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jelenaw.myartsonline.com/22772588856.pdf
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_abdfa72acf994c13a31af88f89612bfb.pdf?index=true
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_5701182bd60c4c2b8feffcb06115f57c.pdf?index=true
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_1d8287f80c1a46b2a1937fb39a78dbeb.pdf?index=true
    • http://fasajixibapa.epizy.com/16707912722.pdf
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_b64343216aa449ada0e18f0a649d0324.pdf?index=true
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_dc9c8c9c84614d71b97d4ec62390676b.pdf?index=true
    • http://pojozija.onlinewebshop.net/jameguv.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_95ec5af4799148c3ad921ec3ed4fcea7.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_off0000d921.bin
42b1664f8f07f9e02e61ae3ae103dfb240f3d14704642486965b4da0b48afe2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 5228 bytes
font_01_sfnt_off0000eac4.bin
faf75d697692f5fc020cdf99427f45305ca39b7fce0d14b88441ff76198a9dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 10872 bytes

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