Malicious PDF — malware analysis report

Static analysis result for SHA-256 c252fbf974614545…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 02:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbd637d01df27ada093b91b2e0964959 SHA-1: e1ad541d9150bc1de240c6ec8b01b0ff770902d2 SHA-256: c252fbf9746145457148dc626081d5d03ee9bb5191799b302557b63c50bb1cf6
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least one pointing to a disposable hosting domain and another to a domain associated with link farming, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the lure of a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/award?keyword=2d+and+3d+shapes+properties+pdf
    • http://mon-cmso.best/tabla_conversion_de_cm_a_pulgadasw83h6.pdf
    • https://xurozakewera.weebly.com/uploads/1/3/1/4/131414240/welisifulasi_vatepewakekebam.pdf
    • http://bitjoms.xyz/graco_duet_swing_replacement_partsb7oi9.pdf
    • https://cdn-cms.f-static.net/uploads/4411481/normal_60560340b0201.pdf
    • http://jekeluxuto.mywebcommunity.org/qu_se_puede_comer_en_la_noche_para_no_engordar.pdf
    • http://car-test.pro/best_free_subscription_trials3g1dh.pdf
    • http://cabinetshq.xyz/56697895316ge1nq.pdf
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/9287685.pdf
    • http://wubujonil.getenjoyment.net/33453145246.pdf
    • https://cdn-cms.f-static.net/uploads/4455399/normal_60530a2ad38a9.pdf
    • http://xedanono.iblogger.org/why_is_my_samsung_not_turning_on.pdf
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/korej.pdf
    • http://axecheat1.xyz/gp_medium_tent_heaterzrrfj.pdf
    • https://static.s123-cdn-static.com/uploads/4480750/normal_5fc88fecc0b75.pdf
    • https://static.s123-cdn-static.com/uploads/4384464/normal_5feef70d58ae8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e519378a-5e25-4d92-849d-bf886a13486b/sizetavebeki.pdf
    • http://tuxalazurasel.epizy.com/dunajerasifulimoberus.pdf
    • http://ginubav.epizy.com/download_free_theological_books.pdf
    • http://ximuxulizi.myartsonline.com/37974045105.pdf
    • https://uploads.strikinglycdn.com/files/60c3e67e-6ad7-4aef-8a21-115c1328286a/amplificador_de_sonido_casero_para_celular.pdf
    • https://uploads.strikinglycdn.com/files/0f6899eb-9446-4ca4-ae2d-04255a4ba94e/ejemplos_de_formato_apa_para_sitios_web.pdf
    • http://rabazefobozaxa.epizy.com/84343259958.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_off0000f853.bin
6a7bfe212db06217d2f43fd84ebcdbc1ce0e18dbf9ec901960ecd4f07d446227		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 5300 bytes
font_01_sfnt_off00010a54.bin
22c966e438ff4327f861b9ab1e33ee830f30da3a7a827c79c822365a502e8096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A54 11104 bytes

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