Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3d68f1814f255e…

MALICIOUS

PDF

82.4 KB Created: 2021-03-28 17:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb77d7f5c758c2cd149a12239175037b SHA-1: dd1cf7462d0c9b9b74ea0b40234785ab14ee8e29 SHA-256: 5e3d68f1814f255e4b470a0e310c595173ea9341363accbacf224e8854563f73
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to drive traffic to external sites, likely for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=anaximenes+aportaciones+pdf
    • https://cdn.sqhk.co/fofateze/gVigjja/grandpa_movie_2020_trailer.pdf
    • https://cdn-cms.f-static.net/uploads/4459469/normal_5fd915a83bb0e.pdf
    • https://cdn.sqhk.co/jusitufugaf/d4gggdf/watermark_to_onlinefreeware._net.pdf
    • https://cdn.sqhk.co/sinewuvemomi/hehaVjj/subebilutakalizep.pdf
    • https://zesudegefomoga.weebly.com/uploads/1/3/1/0/131070027/jiviregen.pdf
    • https://cdn.sqhk.co/litalile/g2Ijj88/lojiwuregilakizaf.pdf
    • https://pujawemufupu.weebly.com/uploads/1/3/2/6/132680931/e940d7a5a9e864.pdf
    • https://static.s123-cdn-static.com/uploads/4460072/normal_5fc6f32be7577.pdf
    • https://dimitosakusefix.weebly.com/uploads/1/3/4/6/134631941/0e6fd9.pdf
    • https://cdn.sqhk.co/nanagajog/9QieTsS/free_music_videos_online_downloads.pdf
    • https://cdn.sqhk.co/gixotagokezu/OKgcj8i/nhl_hockey_season_start_2020.pdf
    • https://cdn.sqhk.co/vadezewe/gBcjaii/best_free_call_blocking_app_ios.pdf
    • https://static.s123-cdn-static.com/uploads/4403823/normal_5fefcaf17e9e0.pdf
    • https://cdn-cms.f-static.net/uploads/4409092/normal_600e0a23c564b.pdf
    • https://cdn.sqhk.co/tuzevawu/fouXijl/47589392955.pdf
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5fdba66f4df15.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/696acaa6-d4ad-4621-b4a2-a86a84110aed/59865749580.pdf
    • http://guxozuzemonixe.epizy.com/lakme_flower_duet_sheet_music.pdf
    • http://jifazuniduvosi.epizy.com/levowemarijabanatajufumox.pdf
    • http://gumofiwulova.epizy.com/26490852369.pdf
    • https://uploads.strikinglycdn.com/files/bdef5dde-0814-4bdf-aa9a-9a94d2a5ade0/rebibamodosaxopusoxok.pdf
    • http://lepefefila.epizy.com/92647986965.pdf
    • https://uploads.strikinglycdn.com/files/18b94cbf-78e9-4c86-8d0a-815917a09c28/58044363913.pdf
    • http://lufukasiwi.epizy.com/animoto_free_for_windows_8.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5fa.bin
91c30e2d1ada78d216450f988df81a9b8af68f06a1eabed5d87816fe5ae9965c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 3352 bytes
font_01_sfnt_off000101f9.bin
1b5f3a64c198d345dbe069aba6cf2f0b6f48681231ca034a10571801bf8db95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F9 5324 bytes
font_02_sfnt_off00011407.bin
5de07958267bac9df56d115d9b91eb3f97613dbec5fbe18988bc7d8abb72e0c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11407 11908 bytes

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