Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf70e19aef003005…

MALICIOUS

PDF

80.6 KB Created: 2021-04-02 21:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d2d05d818481ece60a0e9a5bec9167dc SHA-1: a22a90532a02c5720e4ca98d451bd067881ac4d3 SHA-256: cf70e19aef003005033e788c4a7ae7f1a5f6e3221e6b9b0a3f523f67e58db042
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=pathfinder+kingmaker+review+2020 PDF link annotation
    • http://samyog.ru/188392500ay496.pdfIn PDF document text
    • http://dithetsen.xyz/crackle_app_download7cq27.pdfIn PDF document text
    • http://gachihyper.xyz/86797899484py0gv.pdfIn PDF document text
    • http://crysety.xyz/toxet7n7or.pdfIn PDF document text
    • http://mbfsopg.com/jojo_guide_to_the_sweet_life_bookcbd42.pdfIn PDF document text
    • http://zvezdasevera.online/therapeutic_herb_manual_ed_smithdh7dq.pdfIn PDF document text
    • http://trujillostacoshop.com/apoorva_shastry_microbiology_textbook_downloadvexmv.pdfIn PDF document text
    • http://arendaavto.taxi/436800117896y7nd.pdfIn PDF document text
    • http://toportt.online/bizadunasanoxitev6x.pdfIn PDF document text
    • http://bupro.asia/13959374495xfet4.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/hBUgdCR/75942292269.pdfIn PDF document text
    • http://topplafond.xyz/waxawasolghacp.pdfIn PDF document text
    • https://cdn.sqhk.co/rojogonezejo/1bcOjdB/brattleboro_reformer_police_log_2018.pdfIn PDF document text
    • http://neuroncraft.online/what_does_amber_light_on_router_mean7wqbo.pdfIn PDF document text
    • http://changepass.online/jiputasujofuju341zy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3bb1a047-368b-405c-aa3f-b81ce73091ba/how_to_do_iyengar_yoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa65c58-3cd6-4bfc-b1fa-98fa70c262d3/sisesupirokikap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f28bf7f-bfba-4412-bc56-5429ca3150af/pugabuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7b23d5-c378-422b-a2c0-c180028bdf6d/7054221091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf1651f-e071-4aa4-a873-980a9782494f/7_times_table_worksheets_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71696161-b822-485d-b942-3d053f08af16/kafibomeraji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c761bf-f84e-447f-8ffd-f56401ff3733/how_do_i_forward_calls_on_my_avaya_2410_phone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A1 5280 bytes
SHA-256: b3d008751ffa10803d434a045eb255aa9a4057a8d57dcae928c7df7e5099b91f
font_01_sfnt_off0001026d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026D 10424 bytes
SHA-256: 0223ef5e75b556f7d355740a8f58d1d546d4b1d33751ba73958d1d0dcc732474
font_02_sfnt_off00012614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12614 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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