Malicious PDF — malware analysis report

Static analysis result for SHA-256 5277ed460bf2035c…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 22:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3128e5fc590a386743a1bba9c54c6d75 SHA-1: 2c516557fad07a1307714fb19a522266877c51bf SHA-256: 5277ed460bf2035cfe03d1e1c60797c6a40afe7a14c5d58cf4e8d23bfbdbbe67
154 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5734

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/aws?utm_term=math+formula+in+hindi+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372987/normal_60314043eb3ec.pdfIn PDF document text
    • https://cdn.sqhk.co/wanolugago/jehbhjQ/how_to_cut_music_clips_in_imovie.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/jjJgj5U/noaa_live_weather_radar_miami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482208/normal_5fca8b25923fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5ff4d03e989ed.pdfIn PDF document text
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/jopokezomo_tirisu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490375/normal_5ff3fcbd02a48.pdfIn PDF document text
    • https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/2269924.pdfIn PDF document text
    • https://biwaxosele.weebly.com/uploads/1/3/1/4/131437294/dowokolefa.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/bezegoluzose/witipokiwakonaxasor.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/21758013750.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/love_whatsapp_status_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/pozupenoledizukatepad.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_731053c197304d6e80982388f51a5706.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/toyota_corolla_2009_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/63394983717.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/physiology_textbook_for_mbbs.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_e9c6d5262257461faf919113086d4bb4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapijifas/vanepapamijufutum.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEE 2868 bytes
SHA-256: 961dc1380210bdc02715716d6a7e97355048e34260408ad82901b2fe81a5fac4
font_01_sfnt_off00010a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 5108 bytes
SHA-256: 94508d4ee9f032910a5e4a78dee84955b03887ea8ccfe2dc80fc9ba5c978905b
font_02_sfnt_off00011b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_03_sfnt_off000126c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C2 11612 bytes
SHA-256: 5f59547ac62afef030efc1602d7951068995eba6f87e9ca57f24b354c6b60dc3

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