Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1e94ae1ee14487…

MALICIOUS

PDF

71.6 KB Created: 2021-03-02 10:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1e9b05c16c93eb6ce774aeee7801e29a SHA-1: 7f5d24ac0c041823dc9b16af192a03c534b6db4a SHA-256: 7a1e94ae1ee14487bae412f51bae00a7dfd7cfb604cbc8f7100e2ca58ba4a640
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL that appears to be a lure for free downloads, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to a malicious site.

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://leonvi.ru/strik?utm_term=fifty+shades+of+grey+mp3+songs+free+download PDF link annotation
    • https://cdn.sqhk.co/depifozopupe/ZjdjbVf/56885277979.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/Hjeiajh/jekowuziwoxasitatujet.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/samsung_printer_not_printing_multiple_copies.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/Zgsbejc/77006792438.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/agchb6j/89356868531.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/dwMLejf/fawulamisapusazavam.pdfIn PDF document text
    • http://copyright-help-center.com/lujor9qdi2.pdfIn PDF document text
    • http://titanovyi-filtr.ru/94462158095oad1q.pdfIn PDF document text
    • https://cdn.sqhk.co/luzorisu/CGX7haX/38456227413.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/hchgiaW/4_pics_1_word_new_2020_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/lalamiteliw/gjZhcP7/fusoluregagawod.pdfIn PDF document text
    • https://cdn.sqhk.co/suxevevagova/rqHjbSI/47100314479.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/Gjhifjb/wefisar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewuwuja.onlinewebshop.net/pablo_neruda_poetry_themes.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/15510658397.pdfIn PDF document text
    • http://bikilut.epizy.com/videocon_d2h_remote.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_off0000d426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD426 5768 bytes
SHA-256: 1b25c650407212b81bd6533c1950686b251614ccdd91a9854325b8ed04aa50ee
font_01_sfnt_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 12264 bytes
SHA-256: 07bc7bbc0dbd25a8e6fb5271f9cf5b786f12712a97abf60697c15d05230327ed