Malicious PDF — malware analysis report

Static analysis result for SHA-256 207083f967606716…

MALICIOUS

PDF

71.0 KB Created: 2021-03-28 11:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 077e9332c762dee5f6d0c47291d58c4d SHA-1: 645d852366a67fcb628d339fd8cec96349180045 SHA-256: 207083f9676067168f277728215d48605a9e9b3e00617336e6ded02bf9d285dd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/123?utm_term=rectangular+pulse+waveform
    • http://sosiwawivijomo.scienceontheweb.net/albert_bandura_books.pdf
    • https://cdn-cms.f-static.net/uploads/4459788/normal_604ce84f92445.pdf
    • https://cdn-cms.f-static.net/uploads/4473044/normal_5fd1fd93bb932.pdf
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5fe97fab29473.pdf
    • http://kenugizi.getenjoyment.net/autocad_tutorial_3d_house_design.pdf
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6036c5dd7ff46.pdf
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5fd1c10fec6f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/61e26312-19ea-480a-bf18-44c9fd297c64/line_6_pod_x3_live_software.pdf
    • http://wowutuzineko.myartsonline.com/nikon_d3300_costco_bundle.pdf
    • https://uploads.strikinglycdn.com/files/7141bc04-590e-4702-a244-8a28ae4fc006/la_biblia_ilustrada_completa.pdf
    • https://uploads.strikinglycdn.com/files/a7a59a94-585f-40da-a154-a0d40f178921/gazuwediruso.pdf
    • https://uploads.strikinglycdn.com/files/db615d86-f2b9-40cc-85e6-5c09f6e0ad9b/57365700920.pdf
    • https://uploads.strikinglycdn.com/files/197223aa-265e-4bb0-8118-4ae785594977/jogotewusosunazuzujorok.pdf
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_fcf4462bf18c470c808b67a1e33209cd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9a66ac09-1586-4836-a44e-2894a8554d02/nanusifamikis.pdf
    • https://uploads.strikinglycdn.com/files/c0bd6718-1d41-4957-bb65-383478ce3fa1/97197440771.pdf
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_cb8c0a539ece44da8988e5ffc1960cb0.pdf?index=true
    • http://vumamuv.myartsonline.com/keurig_k45_water_filter_instructions.pdf
    • https://uploads.strikinglycdn.com/files/b5578ebd-670a-4915-a6a2-53db161d2cf2/83769201348.pdf
    • https://uploads.strikinglycdn.com/files/5f234045-15a0-4514-bd3d-73c6a703be1c/hoy_seor_te_damos_gracias_por_la_vida_la_tierra_y_el_sol.pdf
    • https://uploads.strikinglycdn.com/files/fa2ae411-597a-455e-a143-54fa44c4a236/the_woman_in_the_window_trailer_2020.pdf
    • https://uploads.strikinglycdn.com/files/afa81e8f-30b9-41e2-a19b-836121591a58/natadukuxizerabitilinisu.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_off0000d608.bin
63312b5412cf0ccd8d2b73a101487252a4f8bae3805a2c8a3bda65968436d60e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 5492 bytes
font_01_sfnt_off0000e8c8.bin
cf58e99c2c356cc532218941272052dd1bec4d78ad760729f4047e8920f209e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 11228 bytes

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