Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0db5515a784416f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-29 01:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f8de22f07a8191a758a05a31c4308337 SHA-1: a580e2d3c6754817c21251eb47302a6977d73b0f SHA-256: f0db5515a784416fd914922acd77355a949d95bfc5c22d8161d7c3c5e52c23c7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, and one specific URL is highlighted as a potential lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=worksheet+body+parts+and+senses PDF link annotation
    • http://dajobod.getenjoyment.net/levels_of_affective_domain_and_examples.pdfIn PDF document text
    • https://mabedokuk.weebly.com/uploads/1/3/4/5/134582143/denuburokujexa-nelinulorigos.pdfIn PDF document text
    • https://vimedijo.weebly.com/uploads/1/3/1/6/131606629/2bf382929700.pdfIn PDF document text
    • https://lerexujirizafet.weebly.com/uploads/1/3/4/3/134344290/lezifuwaj-bodalan.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/generos_literarios_para_nios.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/d2849d04.pdfIn PDF document text
    • https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/vijer_naviwujatuze_tureziluburiru_bidige.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/kukupunopedon/america_s_got_talent_winner_2018_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/how_to_manage_your_time_as_a_college_student.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/wirenufupesezosimoz.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/wogamit.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_f7296843d29c4aa0bad31709eeb57a31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/tetamudovunisowelezil.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/73990230612.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/kubota_l3130_hydraulic_fluid_change.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/polaris_scrambler_400_idle_adjustment.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/zigabagowubomemo.pdfIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_4ef87eeccacb4424be9dd69b9e79da96.pdf?index=trueIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_96cf79c8d7eb4d57ad0e7fd2431fe845.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_6f4a74d4cd2847319ef0d85eac2acc93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/kayamat_serial_star_plus_song.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_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 5332 bytes
SHA-256: e777583c4aa1152df291fdc3de3bf88060450682b31fd1643a6b9c9246bb4486
font_01_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 10440 bytes
SHA-256: 37b2a6a4536f44b3ce2d4b88aee2f2656a15fc70fabc410f08fa80acd8b6d99d

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