Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c485c86e4d0af5a…

MALICIOUS

PDF

69.2 KB Created: 2021-02-06 17:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1afeda47f71f44654ec153afa8b8b546 SHA-1: 705944c1a8d9c790bd880adb94d59df01578a085 SHA-256: 8c485c86e4d0af5ad34c1655133844e70f00a4a788ac93bf112ecfa7544b78ab
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a suspicious domain that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'sanding and painting 3d prints'.

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=sanding+and+painting+3d+prints PDF link annotation
    • http://circulyarkadigital.xyz/drive_download_location_androidu4ael.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/Ctngcgd/47941418677.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/dqUjehg/ringtone_download_for_android_free.pdfIn PDF document text
    • https://cdn.sqhk.co/babakobesuxe/dii8hi4/20625159234.pdfIn PDF document text
    • http://instasurprise.online/bimozutafubuxuzigolov5ktm9.pdfIn PDF document text
    • http://expressvpn.store/rufekiwukujegutz1ssr.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/bt0hgcB/most_popular_sport_video_games_in_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/a84hdGV/ridedawuvem.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/pBdhaja/polytone_mini_brute_jazz_guitar_amp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugokabiko.epizy.com/guxokasutikoro.pdfIn PDF document text
    • http://lowoxewepabetex.rf.gd/gafisuro.pdfIn PDF document text
    • http://godavuvexo.epizy.com/time_saver_standards_architectural_design.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_off0000d3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E5 5360 bytes
SHA-256: d44afcac307ca762af0b0a78f5896c6457e7bf12049097a49cda138bc2ecd845
font_01_sfnt_off0000e628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE628 9904 bytes
SHA-256: 2f894471c83e69efcd2091b72377aa8340dcfb915a00e37a74e60cf5fa6fcd74