Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ba7d48bfae84f7…

MALICIOUS

PDF

78.0 KB Created: 2021-03-12 20:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00e643d382d76ea71f3a1b24614d7611 SHA-1: 133551e6d07f68731d1aa1efdff688df0062e297 SHA-256: 94ba7d48bfae84f71478ec7800596bbb9cb6c68e1b3521c54355f21c8fe42e70
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'fokemale.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'data mining' and the wkhtmltopdf application, suggesting a lure to disguise malicious intent. No scripts were extracted, but the presence of external URIs and the high risk score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/aws?utm_term=what+is+data+mining+with+examples+pdf PDF link annotation
    • http://ostanni.fun/factors_and_divisibilityo9qk4.pdfIn PDF document text
    • http://domensita.fun/risk_for_aspiration_care_planlq3gd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_60177dae79246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_600b38f9b74a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_6041c2ca94472.pdfIn PDF document text
    • http://alex-travel.moscow/tbi_pro_humidifier_instructionsbjcga.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/gfhhcif/rolizoxozukenozizegix.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/ePPUvC2/microsoft_office_sharepoint_designer_2016_download.pdfIn PDF document text
    • http://betflixguvenilirmi.com/juzoxirasifbl8y8.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/tolivajupeku/jujuligupoguwipoluxuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/59645112553.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_9b21d61f8dc74a969d004862d24621c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazofi/23959987213.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_89d74eef0ebf4d25a35889a7ea361a1f.pdf?index=trueIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_a1fbd6fdfdd04b359ea5d1566324df90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/34966189944.pdfIn PDF document text
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_86acda27bc2f4f94bd422f2a907d2623.pdf?index=trueIn 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_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 5532 bytes
SHA-256: 06094010fd5385c1671de07a29b55ee9a288d42f99c253f1308f720477736f19
font_01_sfnt_off000105cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CD 10936 bytes
SHA-256: 9df88a1c873ea3d832030625eedc4530a0c43696586a84329e74d36a16b2d1b0

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