Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8c2033bb3f8a87…

MALICIOUS

PDF

127.6 KB Created: 2021-05-24 23:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e6483882943cdda6f569ffe8eb5e217 SHA-1: d272483c34c8041877e264f217c2b86d7123b55f SHA-256: 7a8c2033bb3f8a872114bbba57da344f93cc80756a6bf1ac124d2072ec709320
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, some pointing to potentially malicious domains, suggests this PDF is part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/dff0018683c62230946cd73877650e40/86214282765.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606f71cb1e4e7---27450053267.pdf
    • http://bkbflooringusa.com/userfile/abbey/file/gepirusegov.pdf
    • https://aspaeng.com/files/image/files/41070892272.pdf
    • http://akcjonariusz.com/UserFiles/file/xegoka.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f8b8b4297---figogebodilupoduvekamab.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ad193bdf7f05c7070a52dbbc72629c66/rewogeti.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/b6f3c32020d84d0ee7bd7538fdc1a887/nirinewilo.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/7b172dd3ff8740d51e419cb1ca14c069/vafiligipadizomofe.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609c28c5ddf8e---wazisakuzudopisex.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/7692233168.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/452b369cb6547c051b5d8d7b720f06a1/57902741426.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0012c96cb---giwuzer.pdf
    • https://ceccarbotosani.ro/userfiles/file/vavilanivateso.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/adffcb216dcd763e2960db16cbd527c0/79727711963.pdf
    • https://2acontractor.it/images/file/dajap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fundamentals+of+microelectronics+2nd+edition+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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b714.bin
207aabe288ebf8f85a0b3e33faa308325831d5acf39dcd4bb12ca4f233001b50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B714 5388 bytes
font_01_sfnt_off0001c95a.bin
79e5a7fdfe3bb5267bd4909fcc172d521b9744470ae2d1b973c9b7b83f2b93f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C95A 11484 bytes

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