Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a97583f9f9cb05…

MALICIOUS

PDF

72.3 KB Created: 2021-03-21 02:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce06aa7719f7ac58c603c89f34e418b3 SHA-1: 55ca9a3cdac6d94d30f8361625181f3d27149c72 SHA-256: 22a97583f9f9cb05a00be9a6653f54b77e691bcd215d3e4239487a96e6290f79
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'bologen.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to density tables, suggesting a social engineering tactic to trick users into visiting the external URL.

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://bologen.ru/aws?utm_term=tabla+de+densidades+de+liquidos+gases+y+solidos
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5ff3e78391e15.pdf
    • https://static.s123-cdn-static.com/uploads/4456671/normal_5fdceb134e543.pdf
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fdd162a68738.pdf
    • https://cdn.sqhk.co/savunowudob/gaWiAPC/56381699050.pdf
    • https://cdn-cms.f-static.net/uploads/4460243/normal_602ba491c425f.pdf
    • https://cdn.sqhk.co/karelevo/0ibsqjc/ikea_black_friday_2018_deutschland.pdf
    • http://wegaturagifo.getenjoyment.net/liste_des_aliments_sans_gluten.pdf
    • https://cdn-cms.f-static.net/uploads/4404123/normal_6021843c46763.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jimomurapujivo.onlinewebshop.net/chinese_alphabet_in_english.pdf
    • https://uploads.strikinglycdn.com/files/15bd1c19-3e87-49cb-936c-b25d0f9e82df/center_for_patient_partnerships.pdf
    • https://uploads.strikinglycdn.com/files/2fb06a42-b18e-4f01-a0ac-123a877c018e/sentry_1250_safe_cracking.pdf
    • http://segoxegigo.epizy.com/48038403690.pdf
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_eabbe7fec2294203b87c6d21205c5846.pdf?index=true
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_3fbbd206c629470c98a6bd6e6c85cad1.pdf?index=true
    • http://fusuxitizubuka.epizy.com/ceres_m_mod_apk.pdf
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_53467d2a1f7e44eb8f22437060a87304.pdf?index=true
    • https://uploads.strikinglycdn.com/files/739d5241-e47d-40dd-8ab4-304b01ea8119/jumozaluvuxipi.pdf
    • http://netawuwimirixor.onlinewebshop.net/53145478758.pdf
    • https://uploads.strikinglycdn.com/files/09d62f6e-456c-4867-aafc-1b441e9319f3/wagotorugivesezumujazapu.pdf
    • https://uploads.strikinglycdn.com/files/430892d4-0fbf-4df6-80e2-2b73aac54cc6/wuvunixoxuxasotano.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_off0000dc2d.bin
297b5221b3d3765d5fa6a5f31a15502e3daef0ad7986d86970ca7de06f1b75cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 5216 bytes
font_01_sfnt_off0000edf6.bin
b70b19090f59eb55948cf47c71acb307733646e365776731934b1503c48fc92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 11280 bytes

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