Malicious PDF — malware analysis report

Static analysis result for SHA-256 98028c294b883468…

MALICIOUS

PDF

72.0 KB Created: 2021-02-16 09:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2411cdcc393543223546ad6f9b0b1290 SHA-1: ab3e995c4c312a29c0f15a4120ca9afe0b121bd3 SHA-256: 98028c294b883468961cb590ffacc6ccd9533d0ab99b9ce203485ea6fce566d7
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated text and an embedded URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of an external URI suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=what+are+the+main+advantages+of+industrialization PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495034/normal_5ffcb797d16f5.pdfIn PDF document text
    • http://heliusdesign.ru/texas_chainsaw_massacre_2_1986bg6ct.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_601392952f4d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5fce9d3b4ce65.pdfIn PDF document text
    • http://scrlt.xyz/retefaponutifebukdx5aq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494452/normal_600c55f81a145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fd18c7d174b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_600b4acf6d814.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478378/normal_60081bd252f76.pdfIn PDF document text
    • http://invitesistem.ru/61345702955wer60.pdfIn PDF document text
    • http://supportcopyright.net/microsoft_stream_download_pc_gratispmgho.pdfIn PDF document text
    • http://verification-help.business/42468511533w3may.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5fc7584c50538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464732/normal_5fe6e19cd5853.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/widofafane/96287034784.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/molezavuke.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/kane_s_wrath_global_conquest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/zowipesazibowonozozugile.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/69983641543.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/84578841201.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/allison_3000_transmission_parts_manual.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_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 5444 bytes
SHA-256: 90b02a693309c8fed32dc29ac9c6b5d2655b0c61a883fd404c9f5b88134fd702
font_01_sfnt_off0000f015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 10016 bytes
SHA-256: b98a702524b6643f96bdb2a4319e19e2154f352fd1a16ec32d48c4c245209fe4

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