Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78c4320b06f469f…

MALICIOUS

PDF

78.5 KB Created: 2021-04-24 01:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4764816ad065b28ef4917d8958463684 SHA-1: 7caf5cc6537b16208f31bfe8bd31cd6244c4d9d7 SHA-256: e78c4320b06f469f8bfa33c4566c7fca54078a6102eda5e6253073dfb2f1ed41
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an external URI pointing to a URL that appears to be a lure for downloading a PDF, likely to facilitate phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading further malicious content.

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://botokaw.ru/strik?utm_term=king+lear+sparknotes+pdf+download
    • https://cdn-cms.f-static.net/uploads/4460678/normal_605d4156e5f9c.pdf
    • http://moneyindia.site/ampli_guitare_fender_mustang_1_v27gmk9.pdf
    • http://jedilinosur.mywebcommunity.org/cognitive_ability_test_practice.pdf
    • http://bugosegu.scienceontheweb.net/full_quran_bangla_translation.pdf
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/dalijipo-madoz-gutikovunilitu-burabamakilizuf.pdf
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/wegewoka.pdf
    • https://sevozinevuzejok.weebly.com/uploads/1/3/4/9/134903388/023187147eaa.pdf
    • http://mjawebdesign.net/23733704939dahc5.pdf
    • https://static.s123-cdn-static.com/uploads/4369903/normal_6004b5878d783.pdf
    • https://denumojadiribik.weebly.com/uploads/1/3/4/0/134042792/51711d926.pdf
    • https://cdn-cms.f-static.net/uploads/4391621/normal_6037e901da15d.pdf
    • http://opensalon.xyz/alison_bechdel_dykes_to_watch_out_for_bechdel_test8dunm.pdf
    • https://tuvozejuwubox.weebly.com/uploads/1/3/4/3/134323710/ee3b8d2dfe5.pdf
    • http://nanamojuvimujo.medianewsonline.com/zofaxovozudukosilaxavoram.pdf
    • https://bexulijariva.weebly.com/uploads/1/3/4/8/134885506/68615.pdf
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/4e15df7acae6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vovuzize/jilenuxukinib.pdf
    • https://s3.amazonaws.com/mekonulegipero/tudamubetam.pdf
    • https://s3.amazonaws.com/tojabixefova/jovazitujipigibaxub.pdf
    • https://s3.amazonaws.com/gelawiweza/50715453788.pdf
    • http://piwakitidi.onlinewebshop.net/system_support_engineer_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/baposivarabuj/jikamafojedilezizejapefu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54b.bin
100b6968a47c24196641690f59a2e8aca9faacd8e4f7973c9b5a56bd0d00c721
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 5336 bytes
font_01_sfnt_off00010794.bin
804386f57ec409611cedf597dd2d7d564a56c32a65894ffcfd3c86fe5a3c6df4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 10892 bytes