Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0f3b0109f4b4da…

MALICIOUS

PDF

99.1 KB Created: 2021-03-31 14:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69acb34b5079983fe6268ef010b58f8f SHA-1: e4c326e08baf482a431d73d4eaedfa96550be1b9 SHA-256: 7d0f3b0109f4b4da2cd4c9a4e6da0fb696f53dd305ff880beb257515c4db4765
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to host further malicious PDFs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=properties+of+bundled+conductors+pdf
    • http://nunerixuvak.22web.org/trane_xv95_error_code_4.pdf
    • https://cdn.sqhk.co/seponidozit/cugfJic/nozefuvale.pdf
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/jitiborexe.pdf
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/lafowub.pdf
    • http://luzepusi.iblogger.org/cules_son_los_tipos_de_medios_de_comunicacin_que_existen.pdf
    • https://wajupinafuju.weebly.com/uploads/1/3/4/7/134752356/b4ae7914af.pdf
    • http://tarusexozof.iblogger.org/8x8x8_led_cube_arduino_uno_code.pdf
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/a0ed4f.pdf
    • https://cdn.sqhk.co/zokosofu/jeArgfL/recharge_smart_card_railway_online.pdf
    • http://gajuduxotam.iblogger.org/administracion_de_la_cadena_de_suministro_sunil_chopra_descargar.pdf
    • https://bebojeraje.weebly.com/uploads/1/3/5/3/135302211/satajoxalexajekimob.pdf
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/logan.pdf
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/61776063.pdf
    • https://cdn.sqhk.co/vupapevixu/cUiL8Jf/color_palette_ideas_hex.pdf
    • https://cdn.sqhk.co/puviponapib/mI8ghlD/advanced_business_english_vocabulary_list.pdf
    • https://lukenuba.weebly.com/uploads/1/3/1/6/131636916/1261772.pdf
    • https://soneputud.weebly.com/uploads/1/3/1/4/131411150/b9be02.pdf
    • https://cdn.sqhk.co/xejudawadoni/ib91Mhd/3043407634.pdf
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/6140038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://30dce114-5b7d-4ba4-aa44-e083516804ec.filesusr.com/ugd/7de0fd_87e118d776e24ec2936597bbd26fd016.pdf?index=true
    • http://bikaxubu.rf.gd/56973472876.pdf
    • http://setuvufijub.epizy.com/imprimer_cession_vehicule.pdf
    • http://mevomum.epizy.com/moto_bike_race_game_pc.pdf
    • http://jaxirelogalitis.epizy.com/star_wars_visual_dictionary.pdf
    • http://pusejik.epizy.com/addis_ababa_city_population.pdf
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_68e00585217b4215a8dcd12351c0ecbb.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_off000144d4.bin
f2ca35fb289bffcaeb07e96a667d58613283baef2f67d496cdff7398e27d4366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144D4 5080 bytes
font_01_sfnt_off0001562b.bin
5be45bcfdae04287c08973d6cd36e012bb240ca3dc1572934e7e8da55022c687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1562B 11844 bytes

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