Malicious PDF — malware analysis report

Static analysis result for SHA-256 49be727a93d7fc16…

MALICIOUS

PDF

151.5 KB Created: 2020-11-13 03:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40a4610bcf7fc956086ba8faf71c7884 SHA-1: 59365e6e77e5aaed17055e190a7fa17ee279bc15 SHA-256: 49be727a93d7fc16b2f9ee28f879e4c98cfb58b52706be35a7cd154cab8d2407
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to 'trafffi.ru' and the heuristic 'SE_URGENCY_LURE' suggest a phishing attempt. Although no scripts were explicitly extracted, the PDF format often embeds JavaScript for malicious actions, and the ML classifier's high confidence supports this.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/123?utm_term=lord+of+the+rings+battle+for+middle+earth+3+steam
    • https://cdn-cms.f-static.net/uploads/4392857/normal_5f92a0822e960.pdf
    • https://xiduxerajul.weebly.com/uploads/1/3/4/6/134696605/wekavapatuw_wotefamerit_lenalole.pdf
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5fa7f9ed67466.pdf
    • https://cdn-cms.f-static.net/uploads/4421049/normal_5fa9c2bf37dab.pdf
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8d5e004c86a.pdf
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f93d2bbb5efc.pdf
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5faaf82a63790.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/naratozunoluwukin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lesepapusojifax/ikea_gronlid_armrest.pdf
    • https://s3.amazonaws.com/fapaga/volvo_xc60_owners_manual_2017.pdf
    • https://s3.amazonaws.com/fovezewi/arizona_javelina_resistant_plants.pdf
    • https://s3.amazonaws.com/voxazedisula/descarga_cine_clasico.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fdbf.bin
d92011960c0f1cfe6b0ba90873ebfb641d08b43312294dcab0cf549f4612905b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDBF 2932 bytes
font_01_sfnt_off00020836.bin
04fd5dcdc30e74fe22647a5530e960f6f0cb65691f9a8cccad766d0f13bac9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20836 5352 bytes
font_02_sfnt_off00021a41.bin
3ce6d62cdb86707926902e3ce3cff94e7aa67c6b15226e8764dd492ceb34ab2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21A41 12224 bytes
font_03_sfnt_off00024210.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24210 4324 bytes

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