Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f25005be71300d5…

MALICIOUS

PDF

79.6 KB Created: 2021-02-28 14:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7ac05ef396de45b7d62a6ee6d074b625 SHA-1: dbbbc14bd748c6cc5a56f8f04558fe66d5bfe7ef SHA-256: 6f25005be71300d52b0ac5d08f7a5fcce8ec5f3b4620bdf0a1936818868f8e1c
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. The document body, though heavily obfuscated, contains text related to a 'Maytag neptune stackable washer and dryer for sale', suggesting a phishing or scam lure. An external URI pointing to 'https://zajinet.ru/123?utm_term=maytag+neptune+stackable+washer+and+dryer+for+sale' was extracted, which is likely the malicious payload delivery mechanism.

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://zajinet.ru/123?utm_term=maytag+neptune+stackable+washer+and+dryer+for+sale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5febb5232986a.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/brother_mfc-9970cdw_printer_driver.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5fc657da545d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367305/normal_6004d95ed2b95.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/ajljchK/jewinijotipojapisilob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459464/normal_5fe652624f608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_5fd86e5417463.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/gfGDjce/dream_holiday_travel_home_design_game_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/giripiponi/gheHiiH/faxolufopusojobijur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/lidojapu.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/topography_of_terror_guided_tour.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/state_solubility_of_chloroform_in_water.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/android_market_app_apk_free.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/vanumexidef.pdfIn PDF document text
    • http://vegexiwijije.rf.gd/petsafe_wireless_fence_extra_receiver_collar.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/army_camouflage_pattern.pdfIn PDF document text
    • http://sipopos.epizy.com/surifojusexikasikolosa.pdfIn 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_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 5820 bytes
SHA-256: d21a0e3aab486b7c252f88950e6bfb389e8817395f66a9b10da4b09a6de1ef3c
font_01_sfnt_off00010dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBC 10328 bytes
SHA-256: a338072e4844f01097ae7fb1cd26e7f3f9f1cc49efe9f7653c62fa9b897a761d

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