Malicious PDF — malware analysis report

Static analysis result for SHA-256 2048e6e886e7823a…

MALICIOUS

PDF

78.5 KB Created: 2021-05-15 16:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 127e3b426e2687a6ec7efb3405b0ed6c SHA-1: 25a51d30e12ad9716bfa90b2fe4eafcafda0f0c7 SHA-256: 2048e6e886e7823acc9b42e99db747a2cbee86bebab86e8948773e5152d1289f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=counting+stars+piano+pdf+free PDF link annotation
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/7997436.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/7298365.pdfIn PDF document text
    • http://xuwivezotuw.22web.org/90820955160.pdfIn PDF document text
    • http://nabizutun.iblogger.org/vosukisiwojepizovesagiw.pdfIn PDF document text
    • http://vixojejuzata.iblogger.org/simabufiratabizepawe.pdfIn PDF document text
    • https://lapunowelozod.weebly.com/uploads/1/3/5/3/135337348/9813907.pdfIn PDF document text
    • https://gejeximiba.weebly.com/uploads/1/3/4/8/134897602/9793674.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/lokosubelatezamabipig.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/libusamagowuvo/tubitufogoruro.pdfIn PDF document text
    • http://wopidexojabin.rf.gd/firefox_for_mac_os_10._5._8.pdfIn PDF document text
    • http://kupobelon.rf.gd/76769524184.pdfIn PDF document text
    • http://kepipejesa.epizy.com/kinexiguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147df819-433d-4525-bb75-fcb54edfae09/why_is_my_honeywell_thermostat_not_turning_on_heat.pdfIn PDF document text
    • http://wimebefivisul.epizy.com/2629243802.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/63622687616.pdfIn PDF document text
    • http://rovarede.rf.gd/benign_adrenal_adenoma_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8961abb8-d909-443b-8cc7-bfb9a7f45194/can_flammable_liquids_be_stored_in_plastic_containers.pdfIn PDF document text
    • http://nufagogofuj.epizy.com/lesakerefexemomufasumefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50263332-5cd7-4b02-a562-dcd8f70ba326/6507528804.pdfIn PDF document text
    • http://jimifodapamusos.rf.gd/vmware_basic_interview_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 5084 bytes
SHA-256: f5f1ae2436698d00d9a42aeae89d05eaef9ab756516fdd59defd9e81fe58ec1b
font_01_sfnt_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 1992 bytes
SHA-256: 845e2af297ca216abdd6ddbc6969826713b198ef297c4c7e812a04e98a1fad12
font_02_sfnt_off0001046d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 12264 bytes
SHA-256: f7fe3c730d7df5cd1fef43d1271fd03b4ae31c8254c5e20436c61fe0945f5ece

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