Malicious PDF — malware analysis report

Static analysis result for SHA-256 816ec046a9461823…

MALICIOUS

PDF

86.8 KB Created: 2020-11-11 12:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af5b97131d3b364bbe8d37cda4c6fa84 SHA-1: 7c9bc17550f5016b6d64d1872e37cde0080e06d9 SHA-256: 816ec046a9461823b469483ff178504ae3261400b550b7c9eed0038c3090bb8c
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to 'First Things First' worksheets, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?keyword=first+things+first+stephen+covey+worksheets
    • https://cdn-cms.f-static.net/uploads/4446289/normal_5fa58d862fd43.pdf
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8fcf2996774.pdf
    • https://cdn-cms.f-static.net/uploads/4403937/normal_5f931d20c6e32.pdf
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5fab292371024.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f961acc496a7.pdf
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f8ba91a87634.pdf
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f9ced67640cb.pdf
    • https://cdn-cms.f-static.net/uploads/4470232/normal_5fa49677ee448.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/banula/zofivirorasoletijifosuva.pdf
    • https://s3.amazonaws.com/nazekisigiduz/disney_emoji_blitz_apk_uptodown.pdf
    • https://uploads.strikinglycdn.com/files/8e6303f4-5727-42d6-be9d-bcff47301d36/87239279673.pdf
    • https://s3.amazonaws.com/vikukinumet/private_instagram_viewer_free.pdf
    • https://s3.amazonaws.com/mutirexa/gowekorifoxezetuxevuk.pdf
    • https://s3.amazonaws.com/lulelepese/cricket_games_apk_download.pdf
    • https://s3.amazonaws.com/fidefofudi/25788986247.pdf
    • https://uploads.strikinglycdn.com/files/e6a3ae78-1bf6-4f45-978e-97546209d2c1/41704294712.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60a.bin
b1f8a3a57cd7234a7aa27d1173075d946b741f5574f2313c14db5b3ac78a9925		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60A 5308 bytes
font_01_sfnt_off0000f83d.bin
b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF83D 3772 bytes
font_02_sfnt_off000103e1.bin
9f62690dd738020d3e721d798cdc13af0ab9de2e12fb89e1b0fcb64394528e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 10360 bytes
font_03_sfnt_off000126d2.bin
1f7df362dba6b1be250dd1eeb8bb6023926e3d25a008b9a3ccf684dab773e0da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126D2 12204 bytes

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