Malicious PDF — malware analysis report

Static analysis result for SHA-256 5455ff2f4794190e…

MALICIOUS

PDF

76.2 KB Created: 2021-03-24 16:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cf3231f1868406051ce2a02922290c61 SHA-1: b58a6c6d8016ba704c866744be5bbbf2764ac873 SHA-256: 5455ff2f4794190e66aa00d6ae2991de376306b0f52138b5a2ef3ac0d4b87dc2
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to a "Bushmaster ar 15 instruction manual" and is associated with an external URI pointing to a suspicious domain. This suggests a phishing or social engineering attack aimed at tricking the user into downloading further malware. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly indicate a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/123?utm_term=bushmaster+ar+15+instruction+manual PDF link annotation
    • http://pevojatinolotej.22web.org/66109487570.pdfIn PDF document text
    • http://vosojivaru.mypressonline.com/acls_book_2020.pdfIn PDF document text
    • http://gavolav.mywebcommunity.org/32980930086.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/pofokajubexisis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5fc7278c2afb5.pdfIn PDF document text
    • http://xifemimuxudita.22web.org/dymo_labelwriter_450_turbo_troubleshooting.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/ukulele_blues_chords.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5ff75e4d5e141.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/migutawalipe.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/xovekolamoxe/tent_card_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/guided_meditation_for_sleep_talk_down.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/wodofitapidupalojamazi.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/how_to_simplify_a_rational_expression_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/52776937487.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/92692076357.pdfIn PDF document text
    • http://vuvezivitajiros.rf.gd/dialectical_behaviour_therapy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/will_ps_vita_come_back.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/50900843044.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/ffbe_guide_wiki.pdfIn PDF document text
    • http://nixutemexeteted.rf.gd/80139680197.pdfIn PDF document text
    • http://sedilar.rf.gd/an_early_meal_book.pdfIn PDF document text
    • http://vukilef.rf.gd/20094657794.pdfIn PDF document text
    • http://mabomiwedetobew.epizy.com/all_i_want_for_christmas_is_you_piano_score.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_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 5264 bytes
SHA-256: 9ef139b081b17998d7a0b9c9bf411ff98b52317f875babd79460747f679f7e4b
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10680 bytes
SHA-256: d9732f4d54db90ddc80e66288309d93912d313f8d852197158f65f902ddaa5e5

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