Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ee8a475b306973…

MALICIOUS

PDF

73.6 KB Created: 2020-12-19 13:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 82e53f58297d279b41119207a6ad4ad0 SHA-1: 38442f7ed5c6fda1feef2fa755e390f9e58396d8 SHA-256: f3ee8a475b30697300216a882354a97edf4526995c34460238e27eb91d3db918
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating a payment redirection lure, suggesting it's designed to trick users into changing payment details. The embedded URL points to a domain associated with phishing activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://trafffe.ru/123?utm_term=fake+utility+bill+template+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8caaa069c9a.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://uploads.strikinglycdn.com/files/71c8613b-63c4-481c-a3cf-233642abba3f/30493881169.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/35113206502.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/99292460899.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/veluvigekex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a3490f-6f14-4597-b1f7-47c030e2824f/90485626239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4f1b39-eabd-4bc9-9085-213045cf6df1/sogang_korean_1a_workbook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d63fe2fce462bcadc7f8/t/5fcf232c5c8977691e362b35/1607410477045/vamukemuwuxug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed012e537a05ef0936a0/t/5fc1273e3485235c86f003f4/1606494015293/vokebanovolo.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/10264018130.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/quimica_inorganica_james_huheey.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/metuxixepekidupubuj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 4796 bytes
SHA-256: e7a8ca40a481c603d9b19478ea768571c43c38366655b2463babcba181e7947c
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 11188 bytes
SHA-256: 31a165a5fd9955140fc8cf8eab5a4c400da626507a4c554b43c17aeee4a9cd13
font_02_sfnt_off00010bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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