Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f718b8095ba4fe…

MALICIOUS

PDF

71.2 KB Created: 2021-03-23 07:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 72a4276833d87d4e536133f318aff938 SHA-1: 239b1f07f4e7d54b24321ab96ad8cda01b21c947 SHA-256: 23f718b8095ba4fe83085b95046ddd9bf1a7a2e61e2001fe6334ae4c9bf71cd6
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 heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, suggests a lure related to a 'guide'. The primary malicious URL identified is https://bologen.ru/123?utm_term=assassination+rogue+pvp+bfa+guide, which is likely used to deliver a secondary payload or conduct phishing. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=assassination+rogue+pvp+bfa+guide PDF link annotation
    • http://idealicait.website/wijobegigexeriwofs.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/kejulun.pdfIn PDF document text
    • http://bella24.xyz/how_to_use_charter_remote_for_tv2uowp.pdfIn PDF document text
    • http://malolufixanovas.sportsontheweb.net/chemistry_a_molecular_approach_fourth_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/dajgSgh/deziparibozetikez.pdfIn PDF document text
    • http://likemulig.iblogger.org/15079638147.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/EJ17gh7/rakejoxosekijo.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/nokiva/vitukovitiwewawakuwe.pdfIn PDF document text
    • http://mowekejerejo.rf.gd/83091365898.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_5d2562e0de7d45869eb1554ecae834de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitozi/xitojevigiwekozikij.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_d39ea114306647858c1a0a8537287cb7.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_c19c57c91e374abe8adfba3e6e5c2db1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/dejotixu.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_62d0f3008bcc4ffe996edc1ca94738a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befafuni/pevapukatonolitugebinelix.pdfIn PDF document text
    • http://mifotabelimudon.myartsonline.com/64410407816.pdfIn PDF document text
    • http://zexubuwebujuk.rf.gd/android_one_o_que.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_off0000d7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FE 5364 bytes
SHA-256: a0519269baedd5ceef5e0116ca942c25711da61833d98ff10a10d4e4e9db8f5b
font_01_sfnt_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 10468 bytes
SHA-256: 016769aecfd1b5ac454b364340556d98c551ff982f47fc2406dd85fde69e6ef6

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