Malicious PDF — malware analysis report

Static analysis result for SHA-256 87331a27a390dd0d…

MALICIOUS

PDF

75.0 KB Created: 2021-03-31 14:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4646000e88bdfd07be15d503e78c0a84 SHA-1: 88469059790af7865c3dcbcd62e4ef4c8b25541b SHA-256: 87331a27a390dd0d2e6d14288a0e4177432bc3008332057350118b05b5c3ebd1
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary focus on `https://seumenha.ru/wix?keyword=arizona+real+estate+purchase+contract+pdf` and `http://xorimomupajo.scienceontheweb.net/tujoginujixevabenawupafu.pdf`, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=arizona+real+estate+purchase+contract+pdf PDF link annotation
    • http://xorimomupajo.scienceontheweb.net/tujoginujixevabenawupafu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377678/normal_5feef2a90fa4b.pdfIn PDF document text
    • http://trikolor.site/does_canon_rebel_t3i_have_bluetoothipok1.pdfIn PDF document text
    • http://english-10.site/lirekaromabowiw8cqx1.pdfIn PDF document text
    • http://maewallace.com/89254556627zxa2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_602bd980e9f32.pdfIn PDF document text
    • http://milanbeachs.space/cours_droit_terminale_stmgmrtep.pdfIn PDF document text
    • http://bivodotofa.iblogger.org/city_car_racing_game_for_android.pdfIn PDF document text
    • http://lordtrans.ru/893479698424bjcj.pdfIn PDF document text
    • http://fidesuwuranotif.getenjoyment.net/zelda_ocarina_of_time_detonado.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/giRjbhd/18852233373.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/OAOghQj/vekezatojanutelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nifusotajezunur.atwebpages.com/27741765807.pdfIn PDF document text
    • http://sigivopowofode.epizy.com/tarowosanumepudogovuzef.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/zumofeferirif.pdfIn PDF document text
    • http://dikawixum.epizy.com/58807023587.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/marathi_calligraphy_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/55735914604.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/nivomeledupoxoga.pdfIn PDF document text
    • http://pagujuropiwadiv.rf.gd/data_structures_and_algorithms_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/android_adb_settings_command.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_off0000e657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 5284 bytes
SHA-256: 08ece49e8e6a42e264a488f8f3b3658c892548582cc87a3bb8d80b5217920b6a
font_01_sfnt_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 11296 bytes
SHA-256: 8523474de09cfd338df6e269a5c65b9b58a93a61378b34cbbe5bf82948c56f5e

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