Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d51a4cefa40f505…

MALICIOUS

PDF

99.1 KB Created: 2021-04-04 07:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2083818cfa8e7208f0594e7951c8c38c SHA-1: 6fa80f52a57cf859aa61b0fa02a0b65082d04436 SHA-256: 6d51a4cefa40f50599d9a64d715f50c70b6ef4bb257facae9e1d79f676d74252
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'Chote baccho ki poem'. The presence of external URIs and the high ML score indicate a strong likelihood of malicious intent, potentially for phishing or delivering further malware. No scripts were extracted, but the PDF structure itself is leveraged for malicious purposes.

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://fokemale.ru/123?utm_term=chote+baccho+ki+poem
    • http://vosalax.22web.org/osteoporosis_elsevier.pdf
    • http://buylettersonline.com/96906944471jn9dk.pdf
    • http://falufob.iblogger.org/39104444526.pdf
    • http://i-men.ru/hp_model_11_y010wm_specsv395c.pdf
    • http://avtoshtorki.shop/kugineriwegumovixalipegnv4zi.pdf
    • https://pagudibaxite.weebly.com/uploads/1/3/1/4/131410234/poxevukuvuwizenupi.pdf
    • http://shop-kid-toys.online/what_is_the_best_business_phone_service_for_smalloe2mk.pdf
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/2597190.pdf
    • http://borigizose.iblogger.org/tata_company_introduction.pdf
    • http://mebelintera.ru/rapidex_english_speaking_course_book_in_hindi_downloadzlfdt.pdf
    • https://fulotagefopag.weebly.com/uploads/1/3/1/8/131857199/941501.pdf
    • http://lnstagramsupportinfo.com/32708371000uhyax.pdf
    • https://zidipezes.weebly.com/uploads/1/3/5/3/135314083/devajiw.pdf
    • http://nibumuxadata.66ghz.com/new_kindle_paperwhite_2018_user_guide.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xekifoxudiduvaf.rf.gd/pafiliguduki.pdf
    • https://uploads.strikinglycdn.com/files/cbc16931-a4ca-4aa4-a51d-0ca166954746/la_casa_de_bernarda_alba_temas_principales_y_secundarios.pdf
    • https://uploads.strikinglycdn.com/files/2ba2aabe-c526-49b3-82cf-677a7ac95793/zevilozumujazedikev.pdf
    • http://joduzot.rf.gd/gofiwiranawafuzir.pdf
    • http://gakafola.epizy.com/0020_xbox_360_error_code_fix.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
stream_006_off00014e58.bin
8187e8eb8ab808b2d4d22f956ae7106862e0bf5183a7259191a4547a29eb0496		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14E58 15920 bytes
font_00_sfnt_off00010fc8.bin
49f7a542ac9a7f3151c54cc61b2eaf9fa132d5ba602c342ecc4b50ddf3a08a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 4976 bytes
font_01_sfnt_off0001208a.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1208A 3720 bytes
font_02_sfnt_off00012bed.bin
115e99c8589a58f9ead85557a2d21837e76f44339fd58fc9a18af313fa3ea66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BED 9976 bytes

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