Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e83c0c708b074d…

MALICIOUS

PDF

72.1 KB Created: 2021-04-29 06:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7a42eb6eed42e204babec5b0dff2aac2 SHA-1: dbe18e5d5e3659411b3cf9650f5cb93853ccb3c5 SHA-256: 38e83c0c708b074d2eba69e872c1e0bd4ea09393f72f34567d73cbecf2c3da9e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://leonvi.ru/strik?utm_term=hoover+windtunnel+2+filter+cleaning', suggests the document is designed to redirect users to a potentially harmful website. While no scripts were explicitly extracted, the PDF_URI heuristic indicates external resource linking, common in phishing or malware delivery schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=hoover+windtunnel+2+filter+cleaning PDF link annotation
    • http://jepewadagamer.scienceontheweb.net/how_to_change_battery_first_alert_9120b.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/occupational_lung_disease.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fc9deaa59ee1.pdfIn PDF document text
    • http://linunewilut.mywebcommunity.org/xomutokifawikixo.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/23859473507.pdfIn PDF document text
    • http://regikumavow.22web.org/zopuwesodikujigipawozutej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_604eafb93b7d4.pdfIn PDF document text
    • http://vukufitu.mywebcommunity.org/exercice_adjectif_qualificatif_epithete_et_attribut.pdfIn PDF document text
    • http://posiriwase.22web.org/game_theory_nptel.pdfIn PDF document text
    • http://sifaritube.sportsontheweb.net/pdf_to_word_converter_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewawisu.onlinewebshop.net/bukofejozamejilunegilikub.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/boxijuri.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/punegeku.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/15669226184.pdfIn PDF document text
    • http://gototura.myartsonline.com/haircut_locations_open_near_me.pdfIn PDF document text
    • http://kumifeti.rf.gd/videzo.pdfIn PDF document text
    • http://denefarow.rf.gd/12606477498.pdfIn PDF document text
    • http://zetesapoxus.epizy.com/tetolonila.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/40622319430.pdfIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_eff4dd79f886424d90304465e46217f7.pdf?index=trueIn PDF document text
    • https://e714dd98-3e42-4604-aba1-6d4b2506b1a8.filesusr.com/ugd/742965_dd400703122d44ad930ededb2027073d.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 5256 bytes
SHA-256: 8f852423c723a1b39cf53cc7e8bed6df5c33744fde41de84993ac396b1e187f3
font_01_sfnt_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 12720 bytes
SHA-256: efb874bdf5f11e81afbe427b702e54c98a7d736db3a67e9fd94176336bf500b1

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