Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d03cad253062b5…

MALICIOUS

PDF

61.1 KB Created: 2021-02-04 06:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 66c2c002a0d9bbdfe08f3533480a8f6b SHA-1: 088d26dea2956318f80b0fd3e8f1e9192a150a4c SHA-256: a2d03cad253062b5496458d4adba67227a278d094f45582e3b17eadc66fd81d4
94 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'druttle.ru', which is likely used to download a secondary payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it functions as a downloader, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

Heuristics 3

  • 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
  • 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://druttle.ru/aws?utm_term=network+topology+visio+stencils PDF link annotation
    • https://cdn.sqhk.co/labifikup/jfeibhg/renepasipowidikib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366408/normal_5ff19cbd297a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fe5d6c5ae203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5ffe2a82ed08d.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/dfeoTrl/rome_total_war_2_best_archers_faction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501501/normal_5ff4c3704b13a.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/hR6jhge/rescue_machine_game_level_13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450509/normal_5fe23b4c2530b.pdfIn PDF document text
    • http://infokurs.design/male_biblical_names_and_meaningsvsrgx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_5fe74c7190b74.pdfIn PDF document text
    • https://cdn.sqhk.co/fudopalizew/eZRijuy/cool_fonts_for_instagram_pro_apk_cracked.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/cgfjgia/jupilepifetenidufufamezir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5fdc1a4394abc.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/Awhh4ge/lagodumofurolula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_5fe7d2e7f1422.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzefoke/hjjci4D/wifi_analyzer_ios_download.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/bibejovixapis/16100290890.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/tamasha_full_movie_hdfriday.pdfIn 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_off0000c0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C7 5180 bytes
SHA-256: c34f033cbe8a5899eec4895ef4c7932a3722a376ab62b60f58733890ee9a0fbd
font_01_sfnt_off0000d2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A9 11176 bytes
SHA-256: a12624c834875bd08d637dfd83e0e107108c538b47837f84f96cbde9d68b9b32