Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3ee61e9eef65db…

MALICIOUS

PDF

76.2 KB Created: 2021-04-28 11:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59e031c5fa99c803b7cc86f6c33532cd SHA-1: c82704bad64acdba0d3daea3b99318a6e6c20327 SHA-256: 7a3ee61e9eef65dbbdd1c49e14c0607871fde93d6e9f4151ef0ce8eda442b45d
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 0.9993

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://leonvi.ru/strik?utm_term=craftsman+radial+arm+saw+table+parts PDF link annotation
    • https://cdn.sqhk.co/gumoxixo/gdhiVje/levaju.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/88346993125.pdfIn PDF document text
    • http://benivosefemiza.medianewsonline.com/rawarir.pdfIn PDF document text
    • https://cdn.sqhk.co/mowezeto/eM7wOO3/ruwener.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/bemomelosajiwoxugoneb.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/zenuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/CicUihh/71678327647.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/51165863858.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/pisedij/how_to_find_dominant_strategy_and_nash_equilibrium.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/fezifevabetokijuvulat.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/how_to_diagnosis_ectopic_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/english_grammar_and_vocabulary_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/petty_cash_ledger_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/gonapiromuxatum.pdfIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_e337823e20c14107ab603204f9b2b348.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c1b6d9-4d5f-4976-bb2a-34adca588adc/ffxv_review_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e04c9b-4615-4f0d-bcfb-97195282780f/74227955685.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/picsart_for_pc_windows_7_filehippo.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_6ace8783446b46b798096952f7faddc2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4337bcb4-c607-4305-85d9-d00c2cc2f790/what_does_it_mean_when_the_red_light_blinks_on_a_smoke_detector.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/makkar_ielts_writing_task_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/zifunireropim.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/74842041280.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_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 5324 bytes
SHA-256: 655707f4f11efbf0cc5f725a73089c9c93e7f186a770e4e16e6be2e3716b451c
font_01_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 10944 bytes
SHA-256: a518f89dce1f77d4b63ffcc9c7add0931f593f427cf4272fb03e9961cf34a7db

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