Malicious PDF — malware analysis report

Static analysis result for SHA-256 6faf1c4d153f6f63…

MALICIOUS

PDF

79.5 KB Created: 2021-03-17 17:31:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6ca47ce23b31bc60dac1fec0d1503a98 SHA-1: b60316e0cefb8933a9dfab9e827c463223bf8a9b SHA-256: 6faf1c4d153f6f631e2cb189680934de51418282ec4b708718375bacd87f8a91
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' pointing to a suspicious URL (xezojetit.ru). This suggests the document is designed to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://xezojetit.ru/wix?keyword=seraphina+pdf+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367656/normal_603f155fb89cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5fee77b3aed93.pdfIn PDF document text
    • http://kuxakutefop.22web.org/adverbs_exercises_with_answers_for_grade_3.pdfIn PDF document text
    • https://vekafikag.weebly.com/uploads/1/3/5/9/135986004/3805065.pdfIn PDF document text
    • https://dizawiwutap.weebly.com/uploads/1/3/4/6/134629961/purasuna-jumolofodeweli-dixetoviwimux-taxituseteluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5ffb327d6550a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/91310146246.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/mobile_movies_free_hd_avi.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/my_booky_wook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98711f9-4266-4b1d-bff7-48062ee9e5e4/proscan_32_inch_tv_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/call_recording_software_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/android_samsung_file_transfer_windows_10.pdfIn PDF document text
    • http://pusobif.rf.gd/634535608.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/77418263865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60dda1f2-7e8c-4134-85de-7d2731aa40fa/air_force_1_pixel_gold_chain_nike.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/59622030711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb935b4b-0321-4c19-b8fb-41f605a447b4/zuzogasibak.pdfIn PDF document text
    • http://toreminasek.rf.gd/girasagefawap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4285b363-4c95-4d54-afca-8cd0fcc7102a/verizon_fios_24_hour_tech_support_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/mufalabomemaluzisasen.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/78987964879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8831c3e-7eab-45c9-9b70-b5af398f2841/what_is_screening_in_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/ar5_synthesis_report_climate_change_2014.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB34 5376 bytes
SHA-256: bd0167da0ba1fb20a1d17e7d005b75368dbdadae757594a2955e1756a32e9963
font_01_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 10464 bytes
SHA-256: 5d86de61ec7370f2f4082f8192bef0c3c1cadbcabcd73819a9e11edee235d786

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