Malicious PDF — malware analysis report

Static analysis result for SHA-256 71efae6ef31335ea…

MALICIOUS

PDF

80.0 KB Created: 2021-04-02 23:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e24d6be251bd176e2acf98cd7f5ccdec SHA-1: 77e10f96f29b717dd015c25c047cf8fd0721aa27 SHA-256: 71efae6ef31335eab22b919df733f67a41bfade0592427c33021668b36219087
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a lure for downloading software, specifically mentioning 'descargar super mario 64 hd remake apk'. Numerous other external URLs are present, suggesting a distribution or phishing campaign. No scripts were extracted from this sample, but the presence of external links and the ML/ClamAV detections strongly suggest it's part of a malicious distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=descargar+super+mario+64+hd+remake+apk
    • http://sollabs.xyz/60996253424zdvwe.pdf
    • http://eyebrowthreadingdallastx.com/92428813309n3flj.pdf
    • http://momentshop.website/supply_chain_management_a_global_perspectivexs01r.pdf
    • http://arfesopt.com/79589677982oa2jb.pdf
    • http://openlait.pro/doctor_faustus_act_3_scene_1_summary8llr8.pdf
    • http://piredvizhnik.com/8_ball_pool_pcv85w0.pdf
    • http://makedctl.site/swot_analysis_template_powerpoint8gwid.pdf
    • http://hackins.site/kunewebiziloc.pdf
    • http://goldotzyv.ru/7449102745zvqqr.pdf
    • http://mbfsopg.com/dot_safety_rating_upgradeb0z3m.pdf
    • http://hurricane1.space/ak_pembe_aknt_adet_iaretisizzfkw.pdf
    • http://vuvuga.xyz/wepal5b8ih.pdf
    • http://creditpm.com/8528790261xxw8.pdf
    • http://paktum.pro/467065996106st0b.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://stnold.com/bugukapiwez68w7y.pdf
    • http://abanca-electronica.com/gevakiurzm0.pdf
    • http://avto-trokot.xyz/father_and_son_fishing_silhouette_tattoo4gkq7.pdf
    • http://kvyovk.xyz/algoritmos_ejemplos_resueltosgh9ls.pdf
    • http://fsbsiod.com/bushnell_pacifica_20x50_binoculars_review9107x.pdf
    • http://lesantyqas.online/62243766645mv4lk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dce1fb98-ef9a-4a9f-811c-0a1af7826f32/marshall_mg30cfx_setup.pdf
    • https://uploads.strikinglycdn.com/files/40050cd8-3ca1-4cb4-82d9-615bc0f02d63/mimaxokubopowenetate.pdf
    • https://uploads.strikinglycdn.com/files/440549e4-3461-4715-b3c8-fffc801061ca/introduction_to_anthropology_psychology_and_sociology_course_outline.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_off0000ea74.bin
86f724e93829d59c7b0b08eaab0aac3d0d4ecc70115b505266aa896adcbd7bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 5760 bytes
font_01_sfnt_off0000fdfa.bin
c47a0caf01992dc2339729975a8255878c8e328788a1f55550a4297674266aeb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFA 16576 bytes