Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfab3440b29bcd2e…

MALICIOUS

PDF

81.1 KB Created: 2021-02-04 11:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b1d05380473205c2d91841ce269f0952 SHA-1: e1b9d9415c02f5ee83f40c5101233b645c47de5f SHA-256: dfab3440b29bcd2e473a272c2214be191482337af260a307b330bfed106bdd4c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a lure related to a humidifier manual, suggesting a phishing or social engineering attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=holmes+ultrasonic+humidifier+manual PDF link annotation
    • http://fringigejy.site/gebemamudegunusvf07.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/mitosis_coloring_pagex7bqs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490377/normal_5fccf903ae969.pdfIn PDF document text
    • http://nekretnine.site/52882113601sfyor.pdfIn PDF document text
    • http://onlinetiser.website/magic_eagle_keyboard_manualq8eda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374689/normal_5fca0c712d534.pdfIn PDF document text
    • http://insitemonitoring.com/divevuvogigefijuk0ec8s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putazosaw.epizy.com/foxob.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/axis_mutual_fund_redemption_and_cancellation_form.pdfIn PDF document text
    • http://dojagosixotebut.rf.gd/cdc_guidelines_for_hep_b_booster.pdfIn PDF document text
    • http://firixafuzive.rf.gd/28546836149.pdfIn PDF document text
    • http://degepedafapuf.epizy.com/hssc_clerk_exam_2019_official_answer_key.pdfIn PDF document text
    • http://wepatimaleb.epizy.com/difuwirobalavi.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/abacus_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/endnote_x7_software_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/appendix_guidelines_harvard.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 5220 bytes
SHA-256: 74e8826a351a7c531d8beea45c9e00ea8e55ea26699dc328c02b58678b3243ac
font_01_sfnt_off00010f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3A 11892 bytes
SHA-256: 6043786d9ceba313728c673e3adb0d971d34469345611c09d6d477f246d4a356

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