Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e94253e35a1603…

MALICIOUS

PDF

68.7 KB Created: 2021-03-14 15:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0e3a39bf893a5918006961705bf87499 SHA-1: 0c7370b7d871dbe774956448a4bba6afa70dbb50 SHA-256: e7e94253e35a16031e9c6994be4a7e6772e362fb59982d40c3e8e3620acd7c81
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 0.9996

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://druttle.ru/award?keyword=zikri+afaan+oromoo+pdf PDF link annotation
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/fesikob.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/9104379.pdfIn PDF document text
    • http://instapresent.site/geankoplis_c._j._transport_processes_and_separation_process_principlesd9ro5.pdfIn PDF document text
    • http://hotgirls.host/772612908343veii.pdfIn PDF document text
    • https://juguzitusiketi.weebly.com/uploads/1/3/4/3/134372303/9262308.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/435dbcafb7326e.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/sesekibaxitoxe_kolevegomonuw.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/feborobegibew/29405150388.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_1a21348c1cca4e6a9ed6b68262aee70b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobesogum/bubelulijanepuropubo.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_4b7011ecb03d45fa9f8b429d97c0bfff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/decision_tree_template_word_2013.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_8403cb1d9398478da004a3a27916f609.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/77634654269.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/87675895182.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/liu_dng_metformin_1000mg.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/battle_royale_manga_espaol.pdfIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_fce14b2f670b429097403d5e1d9e2ba3.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_554d24f152314abea81a9384784d30f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/iggie_s_house_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/pidas.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/sap_crystal_reports_cost.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_off0000cf95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF95 4996 bytes
SHA-256: 1bb41c6e7a0bcce50094f7b63da7e8ff6041be8e2f89f939bf48b611205dab02
font_01_sfnt_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 10564 bytes
SHA-256: 153c69806c13a8aab651f77d24f31b91b9fdcc69f079b04d3061856f96b43a30

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