Malicious PDF — malware analysis report

Static analysis result for SHA-256 043f76868472c97f…

MALICIOUS

PDF

76.3 KB Created: 2021-05-16 14:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 088239d4036553fb058036e548ffe40d SHA-1: d8ad318c50cb6ba230f51ae02641d8d73883ab2f SHA-256: 043f76868472c97fb579ed6a2c0ed6f1c3da1d6da2dc79e9a6e4892e601ddd54
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs and a 'download button' heuristic suggests the document is designed to trick the user into downloading a secondary payload. The document body, though heavily obfuscated, contains text related to spreadsheet manipulation, potentially as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a32bb187---jotimajunugovudefu.pdf
    • http://portalcom-b2b.es/img/user///file/_0197645001619878873.pdf
    • https://cuisinescartier.ca/upload/editor/file/52248406994.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2vnla5cp0qbi5bqhp17aq6ogt8/589575611.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5c01e87d1bc2bc0a12c6602102f87216/3331796297.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/8c729e98cad9ebc8b7e5122c5d55fecb/90134952420.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088ba55c751a---minepudatak.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc39faef70---40527262919.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/726e363304b7ae5cd48a6f3f9d8fca5f/tejalagilekukoxisanufu.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788fa6976ff---85561858223.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/5efd1b9b6df50d8caa35a4f490f5419c/petopovoviserirof.pdf
    • http://altinay-law.com/images/file/lunab.pdf
    • http://fitviewer.biz/files/file/74955278843.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/046699a8e3a14a6e5566652a296dc99b/87665754793.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/q867n61tjsa2j68c59859dkf54/fajigiwamotejo.pdf
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/a356e5f9e05af806c1e904364b60243e/wefiwoxedidetubolodeg.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/6b7c46e76rbvh1f2klojahb5b4/45252297896.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=remove+brackets+from+excel+spreadsheet
    • 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_off0000eaf8.bin
b17e449a8c110d84531d7b761c3b1aa6c3326628afea733c7c4c345b4c71610c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 5736 bytes
font_01_sfnt_off0000fe57.bin
b2a8b1c9e1deb1daf28ab9462c3ef8dd9a269c25c8bb8778f7b582ba1cd39b23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 10896 bytes

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