Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6df8e5b3c00b7a…

MALICIOUS

PDF

71.9 KB Created: 2021-02-22 01:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9ace4e13780e25cb94ef027917f76214 SHA-1: 553a76c18a0e8cfe01f8865ce5ac758fb22ab9a5 SHA-256: 7b6df8e5b3c00b7a9a2e4f082901ae84cc62d470c3e146666e7a5d2e9a7984af
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://yafferge.ru/aws?utm_term=2008+dodge+avenger+starter+relay+diagram', which likely serves as a lure to download further malicious content. The document body, though heavily obfuscated, appears to be a garbled attempt to present search result-like content, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=2008+dodge+avenger+starter+relay+diagram In PDF document text
    • http://private-channel.site/luxedenanujowurotewefga0ev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb524135804.pdfIn PDF document text
    • http://keep-travel.com/25571435162v1bwd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fe0e0a354f68.pdfIn PDF document text
    • http://differencecheats.net/bleacher_report_live_aew_fight_for_the_falleny65u3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471995/normal_6002d0bf4204e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_601a9ece950c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_601f875b0f887.pdfIn PDF document text
    • https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/4284839.pdfIn PDF document text
    • http://sweetmeet.online/norivomixawenawofucgaok.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/nikemeza.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/college_course_outline_templateawom6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5ff9ed2a7cca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_60159aa3ea739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426954/normal_60228bf257e61.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/macrame_bracelet_patterns_hempnmskz.pdfIn PDF document text
    • https://suxutusebosogu.weebly.com/uploads/1/3/1/3/131379987/5527226.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/wukevirenesu/45699127377.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/75844892120.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/bichagadu_movie_songs_naa_songs_free.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_off0000dc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0E 5680 bytes
SHA-256: 32ffcb24023adcca2f6bb9ff21535c7d351c0f03a8bf24ca5d523844353409de
font_01_sfnt_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 10252 bytes
SHA-256: f6f0437a0d0135bd2ade4515bf53e00b87379b6a4caf0beeb63cc8dd85e6f83e

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