Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e12ec7d479eda2…

MALICIOUS

PDF

73.5 KB Created: 2020-12-23 01:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4753824a484cbb0228138a9a502844b2 SHA-1: d59ff60d778e65104d13377cbea7e966277de3ae SHA-256: d8e12ec7d479eda26e0481af8f65fca423a099002f02b21318c509362c6d2c17
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this, flagging the file as malicious. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious link under a seemingly innocuous title related to a game download.

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://ggtraff.ru/strik?utm_term=download+game+robot+city+battle+mod In PDF document text
    • https://rirofogarerena.weebly.com/uploads/1/3/0/7/130775169/5835273.pdfIn PDF document text
    • https://xopapukewude.weebly.com/uploads/1/3/1/4/131408664/wupekabemid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_5f97cf7a45409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5fb2cd5ad1830.pdfIn PDF document text
    • https://zasesitezo.weebly.com/uploads/1/3/3/9/133986829/b8b19872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2d9348ef7301f8b1d7a62/t/5fc9bc242ae1264a03911606/1607056421687/asteroids_near_earth_nasa.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/difficult_questions_to_answer_with_friends.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c12374-9ad5-4c23-8800-58c5313e152f/66539892156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76dcbef7-e4be-430e-9e56-aab399fb8739/52280848505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4a28a8-3f88-4081-8276-4799576e43ea/39427342231.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce7c2cb34b2f1f83086fe6/t/5fd744320f11661d4c47a28d/1607943224240/gitinulowumipiwuxix.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC463 5416 bytes
SHA-256: d9df922b910c7c650a56eac75cf4d10009b187c79177922550bd0dcb0ee863cb
font_01_sfnt_off0000d6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DA 11492 bytes
SHA-256: 071491ffbab68bfa8d27f86243bfc096113242ec0ce5df98e251cedec35181ed
font_02_sfnt_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 17496 bytes
SHA-256: e4ddc33a8651df089027a9f85c8c9f6f1d68e8b7b353c507f533acf0340b7018

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