Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23005ea5b562151…

MALICIOUS

PDF

76.8 KB Created: 2021-04-12 18:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e11f579461b4ccc1922603207f728091 SHA-1: 75280bbf60c2e32a59726bf677dbe4437e9a49f4 SHA-256: e23005ea5b56215163745efeab648b7b9778e2cc9c53efaf3a46f793256a4db4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://zajinet.ru/strik?utm_term=rv+carbon+monoxide+detector+false+alarm PDF link annotation
    • https://sudegefaxir.weebly.com/uploads/1/3/5/3/135323135/8932245.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/7fb4dd22780584.pdfIn PDF document text
    • https://kovajokuluvemu.weebly.com/uploads/1/3/5/3/135335912/rovezogiva_xigegaze_kuvomasebi_ropumezibejav.pdfIn PDF document text
    • https://xunitumewotoril.weebly.com/uploads/1/3/4/6/134612341/9788aae39b88b9.pdfIn PDF document text
    • https://wajutuba.weebly.com/uploads/1/3/4/6/134656264/saxulutugo.pdfIn PDF document text
    • https://mejibafizafev.weebly.com/uploads/1/3/4/0/134042836/riwuvifikupojasovuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace1516f-3965-4c82-96d2-a4d82bac11d9/70203412812.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/19542753832.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_7f62b377a49d43fa93b239c5a8b18856.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/odia_new_dj_song_mp4.pdfIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_b7c9213654e64f1d9176f3f7d3035a71.pdf?index=trueIn PDF document text
    • https://80ce5912-1c67-4773-adf4-abf614566e91.filesusr.com/ugd/acb48a_feb003769d3f4aeeafc67b104b94acf6.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_b38833ed71f44079a3ba19b47a08659d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kimone/adventure_english_full_movies_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d9f32a-4678-4e6b-85a0-e9c18ed5373d/how_to_update_s7_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/rokuxinutewidaz.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/descargar_aplicaciones_android_para_pc.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_1c3062a9f4b44bca8298063a43fd5a07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/punjab_judiciary_exam_2019_answer_key.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_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 5440 bytes
SHA-256: 1f5abb75310f2a0a51ad470ca476a6fd296971338b8b1451b079ee676bc861cb
font_01_sfnt_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 11200 bytes
SHA-256: cbbd23c3a1d4277b89b3d2ec3e369c7f127ab7c4fabbbdedfe9c1de18565307e

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