Malicious PDF — malware analysis report

Static analysis result for SHA-256 a518b076de2d58d3…

MALICIOUS

PDF

74.8 KB Created: 2021-04-06 07:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d54db5d5949e7dafdd01e3c59a1e470a SHA-1: 0966bfa6bb807c9aa78c935139c791aa00fc469d SHA-256: a518b076de2d58d37514982820acbe4af40c7cff33d70bf59f406743b396e2df
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/award?keyword=defecto+del+tabique+auricular+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391326/normal_604af78910c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_60677416c40e3.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/igUgiji/flying_motorcycle_simulator_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366044/normal_5ffc55eed23a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414173/normal_5ffd47eea08ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378606/normal_6003bb15c9209.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/jiAkhej/48234353265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_604468a90f45c.pdfIn PDF document text
    • https://cdn.sqhk.co/pazibafax/wmhaiia/ketewenizitivaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_5fe2598eb4362.pdfIn PDF document text
    • https://cdn.sqhk.co/vejurumilef/iid6ij8/faduvedirikutema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_60615be32a027.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_2554cf9ae5f94f0e8f5434bb04616dcb.pdf?index=trueIn PDF document text
    • http://zogujiduguku.epizy.com/pt_kereta_api_indonesia.pdfIn PDF document text
    • http://wisunomimat.epizy.com/carlill_v_carbolic_smoke_ball_judgment.pdfIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_1a1965074c234abfac1a67803c0f434b.pdf?index=trueIn PDF document text
    • https://c0add167-8731-41f0-9a7b-3d62f09b0499.filesusr.com/ugd/879476_0d2102062eb5498c9e87112f8b258825.pdf?index=trueIn PDF document text
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_86d8a96afa124122b874047a82174853.pdf?index=trueIn PDF document text
    • https://73808e0e-d5df-4584-b63e-1552d949bc0c.filesusr.com/ugd/8d2ea6_7a1de91c8a3b4736a6f65a6dca396169.pdf?index=trueIn 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_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 5236 bytes
SHA-256: e16614fc9ddd4424f1fdab3fa48ec76f65645ccf29d6ebb3fa93f86023823819
font_01_sfnt_off0000f7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 11368 bytes
SHA-256: a5f1ec9274a595692dd6074ba8882ed7056e2eefcdc1b83bbec3458bfaa3979a

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