Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cfb06438c3e80e…

MALICIOUS

PDF

95.3 KB Created: 2021-02-28 20:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e41082cf602892df4934ed372bd383d1 SHA-1: 1ad0f73fa3eef4d108d13a2b32a26fb8586dbab6 SHA-256: 06cfb06438c3e80e9f36b33281fd2eb4255e19ef3b13655d22ae25c2cc6aff8b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, 'https://druttle.ru/wix?keyword=mutant+fighting+cup+2+unblocked+at+school', indicates a lure related to game content, likely to trick users into visiting malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=mutant+fighting+cup+2+unblocked+at+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465123/normal_603af850aaaa5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375887/normal_5feb6750ad289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480387/normal_5fe8f220b7931.pdfIn PDF document text
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/5b0da85a0045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_6017791a530d3.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/323123.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/PL7vhdc/apk.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/a969188eea695.pdfIn PDF document text
    • https://gofetudorupu.weebly.com/uploads/1/3/1/4/131408581/jesobexosawul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/loginodisiwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/age_of_empires_castle_siege_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/kipegipusefoluwojunibad.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/palukizero.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/tokimunabuvirezi.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/insulated_corrugated_steel_roofing_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/juvafuli.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/80971440326.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off000129ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FF 5544 bytes
SHA-256: 94d9ce263a606a8eb65eaae195c398a35e9eac344584095712471717b58f319b
font_02_sfnt_off00013cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD4 10520 bytes
SHA-256: 37949e7bc8b448a6f4907448cfcc4a149a8d199b75f8f0f7d0d03a173786c260
font_03_sfnt_off000160e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160E4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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