Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c16e641931c5a4…

MALICIOUS

PDF

69.8 KB Created: 2021-01-21 04:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ce0bf732a6296c436624be2610476de1 SHA-1: 871917734d0d7ce7f3928edb668c902cebc6d442 SHA-256: 21c16e641931c5a4730f87b7f0da01ca412a57a7ef30478d3fd6973a9e9d2e32
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded external URI, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, suggests a lure related to a 'Beginners guide to tattooing pdf'. No scripts were extracted, but the presence of external URIs and the strong heuristic firings point towards 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://bologen.ru/123?utm_term=beginners+guide+to+tattooing+pdf PDF link annotation
    • https://cdn.sqhk.co/zupodejadofe/hHigmeK/zixibutadilili.pdfIn PDF document text
    • https://cdn.sqhk.co/javufikari/jXhfJjh/offroad_driving_simulator_4x4_trucks_suv_trophy.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/icGpkrB/cat_running_wheel_funny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_5f96bdc227387.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/jicOeid/craft_master_glass.pdfIn PDF document text
    • https://site-1178057.mozfiles.com/files/1178057/whatsapp_wallpaper_images_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/55hau0r/38910597875.pdfIn PDF document text
    • https://site-1174138.mozfiles.com/files/1174138/kpop_groups_male_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/hed5Qio/cat_goes_fishing_2019_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/acggAgc/gomidefojutabomilero.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/9voWggd/moody_gold_lightroom_mobile_presets_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fab32e55a777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://motinekan.epizy.com/kuwoxalubekunutin.pdfIn PDF document text
    • http://ladorum.epizy.com/34033604371.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_off0000d59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 5224 bytes
SHA-256: 19c956663c34862aad6a6d6a0ce18ab72390fd94dcf6bc7d36dcbf38d1191e7d
font_01_sfnt_off0000e772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 10416 bytes
SHA-256: eaa695a204b12b08e8724e647029243c1bb80642a4f6c80c0eecfd8539fe6134