Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0785499a8d8903a…

MALICIOUS

PDF

79.5 KB Created: 2021-03-22 05:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92952a46f414e771c37f9db9a36c8f12 SHA-1: d9a05f8fada8c1512756b29c5e895c0c92c74730 SHA-256: e0785499a8d8903a0f2b7691b1357006343a4b7528d94c3ed96c10caa7f6e30a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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/wix?keyword=the+tao+of+badass+pdf
    • https://cdn-cms.f-static.net/uploads/4420586/normal_601fad41191e0.pdf
    • https://cdn.sqhk.co/salijuvam/gHHidie/bigufo.pdf
    • https://cdn.sqhk.co/nexasolonit/egdidhe/22945027858.pdf
    • http://rogijowop.sportsontheweb.net/mesepozawiwanige.pdf
    • http://bopolubolef.mywebcommunity.org/benefits_of_music_on_child_development.pdf
    • http://suzofovolavuk.scienceontheweb.net/how_much_does_being_on_a_ventilator_cost.pdf
    • https://cdn.sqhk.co/ridijafugemi/e0MxjjB/make_list_items_links_html.pdf
    • https://cdn.sqhk.co/fipimomozuk/0fheuji/27853412493.pdf
    • https://cdn.sqhk.co/dirotiweze/hgihji5/rhyming_names_for_kiki.pdf
    • http://sotarebesowula.medianewsonline.com/handbook_of_landscape_archaeology.pdf
    • https://cdn-cms.f-static.net/uploads/4404755/normal_601ae88b7d116.pdf
    • https://cdn.sqhk.co/susojareb/ihr1Thc/93799115568.pdf
    • http://siwivelijutore.medianewsonline.com/netgear_prosafe_gs108_factory_reset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_90cda1d178d9470395a27d0c7e973063.pdf?index=true
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_4d7d2f829ced4b188017a5c700fb16bd.pdf?index=true
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_83e3f6449df143f59259242deeb576cb.pdf?index=true
    • http://letutemoxeluz.onlinewebshop.net/what_book_comes_after_the_last_hope.pdf
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_5697a504291e42448bf2b1c8cff4e6bb.pdf?index=true
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_4f323791434b42ac8e28ae71b9d847d6.pdf?index=true
    • http://rixibedi.onlinewebshop.net/8365040703.pdf
    • 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_off0000f89a.bin
1b3d0040142178f2ccdf4405668363a40e5755b38b432a1ba854ed4e4a0cefa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF89A 5088 bytes
font_01_sfnt_off000109e4.bin
d8ffc393be6534be47dbe0bf51b1c568834a3e3137013c5b7e43ed254e6180d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 10968 bytes

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