Malicious PDF — malware analysis report

Static analysis result for SHA-256 65453d7efec33de0…

MALICIOUS

PDF

81.0 KB Created: 2021-03-21 00:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 511ffacb89361a8b29e4afd4c91059bf SHA-1: 25ea8b05a5c5efd6ae969cac1c383ac79425dc3d SHA-256: 65453d7efec33de0addf4f2820a04bcf23160eeb2017ddd8ccccc19d25640558
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, specifically 'https://xezojetit.ru/award?keyword=brand+ibsen+pdf', suggests a phishing lure. Although no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, and the heuristic 'PDF_URI' points to an external malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=brand+ibsen+pdf
    • http://tixshopclub.space/average_cost_to_replace_oven_igniterujf53.pdf
    • https://cdn.sqhk.co/virurewev/yjaz5rh/popular_hashtags_copy_and_paste_2020.pdf
    • https://cdn.sqhk.co/texojijoraso/hjb0hgO/4x4_off_road_rally_pc_game.pdf
    • https://cdn.sqhk.co/rumoligodo/hkXifgf/universe_360_vr.pdf
    • http://policyhelpcenter.com/pejumufeveludowesabijof6siyq.pdf
    • https://cdn-cms.f-static.net/uploads/4489733/normal_6040755f22a41.pdf
    • http://blockhcain.host/alchimista_librohc9rb.pdf
    • https://cdn-cms.f-static.net/uploads/4411921/normal_6056730843171.pdf
    • https://cdn-cms.f-static.net/uploads/4377933/normal_6044682031926.pdf
    • https://cdn.sqhk.co/wazafepel/hiAXieE/lufokepixij.pdf
    • http://logvoz.ru/craftsman_2-cycle_mini-tiller__cultivatorex7tr.pdf
    • https://cdn-cms.f-static.net/uploads/4501479/normal_603b02a2f2bce.pdf
    • http://streamsweets.com/ps4_controller_on_ps3_not_working_in_gameoalpz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_3189d4d9d0204bc6a93384a306a6e4c6.pdf?index=true
    • https://s3.amazonaws.com/zexozavo/89997541276.pdf
    • https://s3.amazonaws.com/potamotaz/44884037614.pdf
    • https://s3.amazonaws.com/dikobepibelun/power_electronics_by_haribabu_free_download.pdf
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_8eab4d4c54de40a990871f769a6369d9.pdf?index=true
    • 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_off000100fb.bin
193a3bb80621a71f1b302124b3cbc2ce5d35f22773033cb1b1666987d50575c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 5192 bytes
font_01_sfnt_off000112aa.bin
1ed9f41212b6de01fd38c66e5b1f20c5fde93b3d53d3a0b3c372db136d5ca087
pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 10760 bytes