Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3e3a4a57771016…

MALICIOUS

PDF

89.5 KB Created: 2020-12-28 20:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7bc15bcc5b75f71e231fca2322ebb5fe SHA-1: 7ed90824623612f0db133aadeac68d12129f6f73 SHA-256: fb3e3a4a57771016ce5d0548cd2be08c3770f805b19608a90994aa9aefc597aa
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Brave and beautiful theme music'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/aws?utm_term=brave+and+beautiful+theme+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379498/normal_5fc90c49dfa40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fe64716311ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fe6c9f161869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5fa8549c39ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f93cf2180947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455180/normal_5fad32dc215a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_5fb6b305ce68a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369328/normal_5fc4fbf9913bf.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/dukavunivifa/siemens_electronic_aquastop_dishwasher_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/39031477160.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/business_goals_2_student_s_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b13b44-15e3-41b4-a58c-95d663986915/73214830810.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/olight_s1_mini_baton_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF73 8900 bytes
SHA-256: 8760049d1c8effa38b1a128d0006dee91c2f338033c685af317e3cc21178a1d5
font_01_sfnt_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 3020 bytes
SHA-256: 694d47c026069bdaa8b18696ce00cd0493b73748bffa28dbb3bdc251ec472c33
font_02_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 5508 bytes
SHA-256: 1a46a1d829759c7d8f4385ddee3386970043fdaf001944faccb968cd048cfd7e
font_03_sfnt_off000103a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 18512 bytes
SHA-256: 8e9caea224538e6c6f186f58ffc92badfa12d71a0e5963bb58958cbf7824d174
font_04_sfnt_off000136e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E3 20172 bytes
SHA-256: 24c54108e7999e5008ae77210d5300868ddd9bfa9a19db1fcd7731566c10b6ac

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