Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bbaa046e4f06d2…

MALICIOUS

PDF

78.3 KB Created: 2021-02-22 22:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 494026e1f8cf2aa2f64bcaf447398312 SHA-1: c2f177309454d2efc4d20450db08a9f7b3e542fe SHA-256: 04bbaa046e4f06d26db13d28e016da5c6e7f76fc7e100f1ce1f8ff71c77aa98b
154 Risk Score

Malware Insights

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

The PDF contains a link that mimics a search result for a driver download, likely a lure for phishing or malware distribution. 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, potentially a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wb?keyword=behringer%20u%20phoria%20um2%20driver%20windows%207%20free%20download In PDF document text
    • https://cdn.sqhk.co/lazogapuvo/oFihiaf/82708212689.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/idaDDLS/48523357953.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/jejeXhj/movie_quotes_about_life_and_death.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5febf7dee41fe.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/NhdpijM/cute_halloween_costumes_for_couples_pinterest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_602454b6b8d46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_602d95efe6ceb.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/dZ4Xha6/67334325992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fffcf5a789d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_600e5e6bce4d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugilunu.epizy.com/34469953988.pdfIn PDF document text
    • http://nevozabewovezo.epizy.com/zasenujevuruk.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/dell_precision_490_motherboard.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_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 5868 bytes
SHA-256: 8214bf3014da3054de15080a9b973fabb7494ec33886ce1612ccb01a7006a222
font_01_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 10860 bytes
SHA-256: 6ab36c5f7210f121731d76955a50b67fe7a5757fe3b18ebd683f054451e595f7

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