Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee59bbb68de65ec…

MALICIOUS

PDF

94.3 KB Created: 2020-11-20 09:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 79ed8f24127d363c43f11a1dde852f65 SHA-1: 61dd731c0c011ab3cae54581ac0c616f474af427 SHA-256: 4ee59bbb68de65ec5222e7a3cb133f19d62f9af910b2af315cf512b522a399be
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=minna+no+nihongo+fukushuu+answers+pdf'. This URL is likely used to lure users into a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://gettraff.ru/aws?utm_term=minna+no+nihongo+fukushuu+answers+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kevava/74945189127.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/vufupulukusozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a13e2f5-a832-4300-becb-b486267ba829/150_sharks_cape_cod_frozen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec250b1-328a-46d1-8f50-af6588544d85/23500802435.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/vezupavor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d045d9d7-2d7f-482e-9b52-64e59368d372/fekexidoziwajedix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37917cc-6f04-44df-bf8c-f790f474ba78/weed_eater_lawn_mower_manual_500_series.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/zumelo.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/64111359397.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_off00012f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F43 5432 bytes
SHA-256: 808923d11a119bb85a6d253d51c010c7a70b1eff2fbe5a75e06c60decda837f3
font_01_sfnt_off000141e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E1 12740 bytes
SHA-256: efdeed009e3dac3a84f5a70b7d0e22337275cb6e07faffecf3f4a538d07e22e3

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