Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f24fbd4bd80c399…

MALICIOUS

PDF

74.8 KB Created: 2021-02-15 13:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3d0476d6c8708e3f2d11feb987156eef SHA-1: b44d327446576d17c45fd4976a55c3782d515adc SHA-256: 4f24fbd4bd80c399f196ecd7de1c83c7d285f6dba823d30e01120ec5a9cd5ffa
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were extracted, the presence of an external URI suggests an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=arduino+nano+v3+0+i2c+pins PDF link annotation
    • https://cdn.sqhk.co/wepurodapike/fFYQmYw/bellbird_valley_farm_thames.pdfIn PDF document text
    • http://tehnotop.site/english_aptitude_test_samplef7z7a.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/fjigjhj/97708734728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371787/normal_60012413d8fc4.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/idhaphZ/81729848240.pdfIn PDF document text
    • http://romeita.space/nunonovizowuxidua1cic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454968/normal_5fdf1c108d4d5.pdfIn PDF document text
    • http://differencecheats.net/vr_concert_oculus_go78e4a.pdfIn PDF document text
    • http://teren.fun/15307735091jhygr.pdfIn PDF document text
    • http://gakivako.iblogger.org/nalazak.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/wiremeresegikon/58959971613.pdfIn PDF document text
    • http://lesexuxu.rf.gd/brandy_bottle_image_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/sapphire_pakistan_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/annual_salary_review_spreadsheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/fatujewijiwarila.pdfIn PDF document text
    • http://tulazupuvive.epizy.com/latest_chennai_city_map_free.pdfIn PDF document text
    • http://vepofuwupalufik.epizy.com/xajokeje.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/beatles_free_music_sheet.pdfIn PDF document text
    • http://malinaliwul.epizy.com/rockstar_movie_songs_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/admob_ads_not_showing_android.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_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 5524 bytes
SHA-256: 94c056d6e77b4d48cfa2dd72ca7b9d39a27ec9bd17bb43bc7f85a5fe1ee7e90f
font_01_sfnt_off0000f5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FC 11948 bytes
SHA-256: eb4cd9b23df3c5aefcc33ffaa6055ec7972ed4f9cb7771c91b0c94becdabc3a8

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