Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeb7e0902347d95…

MALICIOUS

PDF

67.3 KB Created: 2021-01-10 12:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 405b2a61e32797402720cb71b51ff369 SHA-1: edbc7529a4f077c9904efc79c93f101fa8a976ca SHA-256: dbeb7e0902347d95607badaed3da339a05f58e50f2a0aaa0206a7e9868f9e24c
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, traffking.ru, which is disguised as an answer key. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/123?utm_term=ionic+vs+covalent+bonds+worksheet+answer+key In PDF document text
    • https://xazotanosiwe.weebly.com/uploads/1/3/4/3/134314219/tonewomuwobaxogiwe.pdfIn PDF document text
    • https://site-1171608.mozfiles.com/files/1171608/3819852289.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/9cU5gfc/bivinivo.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/lufito.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/4052706.pdfIn PDF document text
    • https://xitawameduzip.weebly.com/uploads/1/3/4/5/134511141/jojadajopopofin.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/feseni/wapking._com_2018_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/capable_of_anything_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/ssc_adda_capsule_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/13523960399.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_off0000cb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4E 5424 bytes
SHA-256: ca7f1f98775dee0e52562df674ffe2f292a5b3ba9eda9c363b2d84c3a848da56
font_01_sfnt_off0000ddce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 10288 bytes
SHA-256: 9f7b54a0b01d13de2638824af520ae957beb2218aab7a63cb42818775ff17094

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