Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba42e17b749dd60…

MALICIOUS

PDF

111.7 KB Created: 2021-03-16 08:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d1880a1d3812f485ed2605af1257d31 SHA-1: 10965f1aa7a82c19042285f85f34a2150bce1b78 SHA-256: 4ba42e17b749dd6002c429c97c98dc3f7f00cc75d1feb1a1a412e2f7fe92db24
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 0.9997

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://maypoin.ru/strik?utm_term=edward+said+orientalism+summary+introduction PDF link annotation
    • http://liwurivosopap.medianewsonline.com/how_to_instal_audio_driver_for_windows_10.pdfIn PDF document text
    • http://chatik85939775.fun/ballout_glo_igiazix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5ff8b6a1ab739.pdfIn PDF document text
    • http://afracheat8.xyz/movomenekodavizadi3gvq7.pdfIn PDF document text
    • http://nikecortez.net/what_is_social_constructivism_in_education9kr4k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5fee80ef6b8a7.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/2015_ford_mustang_ecoboost_specs.pdfIn PDF document text
    • http://mibilivo.scienceontheweb.net/88721517648.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/angle_of_elevation_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_678f438194bc498fa4bd72528ac520a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/ffvii_materia_combination_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/tadituzebifepenajijazavus.pdfIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_155283a96dd44e2a92356e105afd1f5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/comparing_fractions_grade_3_worksheets.pdfIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_f1d794a28f4749b48cef601f92e76f66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/how_to_workout_for_strength.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_75c3b88da60642feb1c54c72456c0a56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/wejenupigonedaleriwipof.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/73596528873.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_cdab4b99d01945f9b197b3202e27c208.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/calgary_weather_snow_report.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_off00017893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17893 5236 bytes
SHA-256: 70a3bee56448579cc445e97ae6f151510a252af02fedf8d06f00dfb59c68d8bb
font_01_sfnt_off00018a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A66 11864 bytes
SHA-256: 4bbf479f0e9bf8d8f73ba64518fda1477c95f908efd0263989f2d1338db44b31

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