Malicious PDF — malware analysis report

Static analysis result for SHA-256 5337edeb2f343c98…

MALICIOUS

PDF

63.4 KB Created: 2020-12-24 23:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ae66369e641b62e4a2183169ded9efa7 SHA-1: 77021380db8bd14497709e3bc4acc943878768ab SHA-256: 5337edeb2f343c9880325fb3db932d9681d65297e5eb89b6db1def3863cc1668
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating an external URI pointing to a suspicious domain, which is also listed as an IOC. Machine learning classifiers and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to image downloads, likely a lure to encourage clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=photoshop+background+png+images+download PDF link annotation
    • https://cdn.sqhk.co/duwewofowus/figDjij/instant_war_ultimate_warfare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474170/normal_5fae17b617151.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/eHidhgP/my_movies_pro_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_5fb253261d2d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f8a4cb992360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f94b34beba4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed527f67-d5ab-4451-9c6a-f2956e662adb/locking_high_heels_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/77065948751.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/jukuvisibakukitak.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/bigo_live_tv_app.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_off0000bbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC5 5784 bytes
SHA-256: 1215d7b96b1e1d65193a1af7087098e7bf3bf55c01838ec7d2a2879000c605aa
font_01_sfnt_off0000cf54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF54 9984 bytes
SHA-256: 9ee30e646c32f62374e7c10f338281f5411d2c6c0e4cf7043036216695bf4de6

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