Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f8c92278fe858b…

MALICIOUS

PDF

80.2 KB Created: 2021-03-18 19:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48eaa24539500af8b908c8b36d2d42f2 SHA-1: 43d56ffb45ddf04e42b917028592cf377e814c80 SHA-256: c7f8c92278fe858b1d2c7dbbfcdab9dec062cae7cc1b20feb5d94b3db9f7cc1b
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, suggesting it's used to redirect users to a malicious site. The document body, though heavily obfuscated, contains metadata related to PDF creation tools, and the presence of embedded URLs confirms a likely phishing or malware distribution attempt.

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
  • 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://midufefew.ru/award?keyword=attic+greek+dictionary+pdf
    • http://xofebuledat.scienceontheweb.net/dell_latitude_e6430_battery_light_flashing.pdf
    • http://xorabawik.medianewsonline.com/xotusiw.pdf
    • http://mekujoviwe.mypressonline.com/author_robert_t._kiyosaki.pdf
    • https://static.s123-cdn-static.com/uploads/4370078/normal_5fe1bdc04b700.pdf
    • https://cdn-cms.f-static.net/uploads/4408881/normal_60396a8b63a10.pdf
    • https://static.s123-cdn-static.com/uploads/4373522/normal_5fee0908445ad.pdf
    • https://cdn-cms.f-static.net/uploads/4484820/normal_60367da436272.pdf
    • http://tafedudim.22web.org/sakijiporupunudujujifesa.pdf
    • https://cdn-cms.f-static.net/uploads/4403140/normal_603f4bc8dd113.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gafedupeba/kalabu.pdf
    • https://s3.amazonaws.com/paxunu/30351129978.pdf
    • http://lofunadex.myartsonline.com/90536880236.pdf
    • http://gevitejivojo.rf.gd/wekovepaxagojudopir.pdf
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_be8ed781b8094b0d95ec9122b1f306e1.pdf?index=true
    • http://dukizovisepo.rf.gd/akbar_birbal_stories_english_download.pdf
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_117b73070d6b40aaa931d23737aa484d.pdf?index=true
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_f6fb1d4c01df4fa8b3d674a20894f840.pdf?index=true
    • http://radopafoxewu.rf.gd/que_es_psicologia_del_color.pdf
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_ebdf974650314f58a4db15dd4b6ea89c.pdf?index=true
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_7a2db857bbd541ffb0ad5762b12b0d7d.pdf?index=true
    • https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_b5e0a6c37ace4342a4e5cb5590766b23.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc2.bin
da699cdb3dfd4110c3237930d4f45b6e272c97ef2cbb1879fa86ed3ad8282fe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 5268 bytes
font_01_sfnt_off000101d1.bin
2802a63b0cdf00443e688811c6f61f7a3437545b50611571553115b034101ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 16752 bytes

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