Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c99bd22ec87056…

MALICIOUS

PDF

75.3 KB Created: 2021-01-31 10:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9b8e4e15d58741cf25c27f082a70582a SHA-1: 45d8bdae3dcd2991759f71283114181d85928729 SHA-256: f8c99bd22ec87056741dc2e33af60ee5e2e70bec8235cc33b051c11406e7d305
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'Riot armor vs flak ark'. The presence of external URIs and the overall detection by multiple security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=riot+armor+vs+flak+ark PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fd6804d76234.pdfIn PDF document text
    • http://mugedly.xyz/vakomapelotx96r.pdfIn PDF document text
    • http://kwini-fini.online/zarubuzedizubumuxivuvenipu1fq0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474746/normal_5fe0921582bbc.pdfIn PDF document text
    • http://alisabor.design/12813724656q7ef2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_600914fe01851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_60105219bc984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403129/normal_5fe5e97c141e4.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/SJSXiQZ/28407263130.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/ih1hiTK/prop_hunt_fortnite_creative_code_farm.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/xomudufe/tutogizeguleru.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/jamorumegapos.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/sojininazoxu.pdfIn PDF document text
    • http://kedokonox.rf.gd/femtosecond_laser_waveguide_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/vomalo.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/89043224040.pdfIn PDF document text
    • http://zamonile.epizy.com/abzan_company_sideboard_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/surivodoxorawerekekoxal.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/cetosis_definicion.pdfIn PDF document text
    • http://fomabobas.epizy.com/context_clues_quiz_with_answer_key.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_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 5044 bytes
SHA-256: 1aeaab2b0e5d8c52ce729793d6d326f3426347ba374ec8de5d6d605a09b0fbc0
font_01_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 10940 bytes
SHA-256: bcb125acb243855f370967adb063ba9951cb03f28f54b97cfe9f9b86378a8400

Open this report in the interactive analyzer, or submit your own file for analysis.