Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfba93e47c93a74…

MALICIOUS

PDF

74.3 KB Created: 2021-03-24 11:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fa317942c5b5a79e55ec1e402e42c9b4 SHA-1: 58de2ba003abaf1f82522bbdecdb4101e26b32ff SHA-256: 5cfba93e47c93a74d59ed6f1343bcf9a093f83bd9baa0458548c341f98a4c7ab
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=how+to+find+street+view+of+my+house PDF link annotation
    • http://vaxuserinux.22web.org/gevakawomepodenex.pdfIn PDF document text
    • https://rifejirofedum.weebly.com/uploads/1/3/4/7/134763588/4413510.pdfIn PDF document text
    • http://zorexodepa.iblogger.org/arma_3_dayz_free.pdfIn PDF document text
    • https://xatuvapezorix.weebly.com/uploads/1/3/4/5/134595272/50946.pdfIn PDF document text
    • https://poxedavuk.weebly.com/uploads/1/3/4/6/134608045/d36d0f.pdfIn PDF document text
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/negetekujokabe.pdfIn PDF document text
    • https://ruwefenoref.weebly.com/uploads/1/3/0/7/130739117/38434.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/mokamoba/what_is_the_major_theme_of_the_book_of_daniel.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/bullet_force_mod_apk.pdfIn PDF document text
    • http://vepisesilutez.epizy.com/pamorebokevisemekov.pdfIn PDF document text
    • http://tewamenuve.rf.gd/8504327216.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_a5f46f367a6e46eaaa00740f618b0f57.pdf?index=trueIn PDF document text
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_846ef28f527047299aa90fb36111c2e6.pdf?index=trueIn PDF document text
    • http://fipivolakiwupod.rf.gd/92032682165.pdfIn PDF document text
    • https://245df057-3761-468b-8bc4-2c9c6734f7c7.filesusr.com/ugd/06c8e1_f938e58ccf744c49a56a4335972dbc83.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_1fbbdfde1370461dab198f5b2909e55a.pdf?index=trueIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_765e427b727446c8af68ecc0bde48d7d.pdf?index=trueIn PDF document text
    • http://wenuwobowikowax.rf.gd/27011179357.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/how_to_use_total_gym_for_pilates.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/screenshot_video_recorder_app.pdfIn PDF document text
    • http://koxaxinum.epizy.com/california_7th_grade_math_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/writing_with_power_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/kiziraritatibuwivum.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/71520357846.pdfIn PDF document text
    • http://mekosogosa.epizy.com/venamulemexul.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_off0000e7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B3 5120 bytes
SHA-256: 257b49db9fcb667e8113dd5403cb7843c582cd4418e017703dc5f0f38159514c
font_01_sfnt_off0000f911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF911 10100 bytes
SHA-256: 4d4ab92b1fea540e6dad205ad788332bac4bd7842bd82cbae342a36afac8210b

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