Malicious PDF — malware analysis report

Static analysis result for SHA-256 27064ffe0f93a3fd…

MALICIOUS

PDF

83.6 KB Created: 2020-11-11 10:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6fe6eb61cb31add9c4b664e234180884 SHA-1: dcf6f7dc8d8a3ebda2c8a30b4ae9e3cb955981c5 SHA-256: 27064ffe0f93a3fd917575ef6b86a9abbc114bd3a116d05c54a1a12df5c248f8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://traffnew.ru/123?keyword=what+does+bu+means PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f872ea6024af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_5fa3f31080b34.pdfIn PDF document text
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/vomum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dadupawo/pdf_files_download_books.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/59470876753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b1498a-3e35-4fbd-8fd6-334cc91e7da0/87713383446.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/possessive_pronouns_worksheets_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633b75aa-4dee-40d4-886f-ce8b8a8c95e1/wuzozadajizebivosime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e077d42-e6ff-4d52-b90e-15864949fe91/78651094994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56a6b1c-705c-40f2-99cc-362db1136fb2/dasefupeziba.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77D 3216 bytes
SHA-256: e1f16f2f067bb961bf7714a6f4702311fe8fd11ca02194353183ad9edf632392
font_01_sfnt_off0000d310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD310 4924 bytes
SHA-256: f41f294e98925a851c8727ec2580013503be3a2ce90e06c2eb58e9dd137f559a
font_02_sfnt_off0000e3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AD 2328 bytes
SHA-256: 3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
font_03_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 15260 bytes
SHA-256: 231cb34700337eb958c081de1137d8cd1d4ee46a907bfc1598aa0c5901eb85ef
font_04_sfnt_off00011bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD3 16500 bytes
SHA-256: fc4fbb45f277ed3616c185c9e51ab54c500938c45089014e467534cc0b9571f1
font_05_sfnt_off00013259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13259 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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