Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59a773d28f4f9b6…

MALICIOUS

PDF

75.9 KB Created: 2021-02-28 01:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5cf221a312da97767daf4dcc9ee666c1 SHA-1: e249216da9fb3f1f72baa15f3ba3ca031715d562 SHA-256: a59a773d28f4f9b6ccd43566b3de0b3d4327917e13eb1cdca3e978c5bf7a9e20
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to lure users with a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or redirect to a phishing site.

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/wix?keyword=disney+oz+the+great+and+powerful+dolls In PDF document text
    • http://microdigitalmeter.xyz/street_racing_syndicate_mod_apkny43m.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/ibMgdhh/spirit_flights_to_miami_from_atlanta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_6035c579a5585.pdfIn PDF document text
    • http://mon-cmb.best/7914152389wxf9e.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/jfhdhde/hidden_agenda_ps4_trailer_ita.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/AISRhgd/technically_viruses_are_not_alive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_6018cdaabcad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_601ee04f29fb3.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/zazelujeju/25395005528.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/line_graph_sample_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/manual_de_capelania_escolar.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/zixujopo.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/p90x_yoga_workout_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/17292574128.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_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 5548 bytes
SHA-256: 22a073060546ee3698ca7d6c87e576d7eadb170c3b44e26966794ce5f8e35774
font_01_sfnt_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 10476 bytes
SHA-256: ed69bf0ad0e73d6c60b9e9733d845e80a1215593759d65315957112e3c605fdb

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