Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e321830cee23dfe…

MALICIOUS

PDF

70.4 KB Created: 2021-03-24 00:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b6a0d9dc65304a376ab8ec4dbd6db715 SHA-1: 62fb8d09cf19dea298f94e217147d4f831021f7c SHA-256: 7e321830cee23dfe50b680cda5c2f30dec47e91c3dabba65270a362fa20cbced
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains multiple embedded URLs, many of which point to disposable hosting services and are used in a link farm pattern, 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 URIs are indicative of exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=uppababy+vista+bassinet+mattress+measurements PDF link annotation
    • https://magivuvesef.weebly.com/uploads/1/3/0/7/130775451/rewodipalulaguwazim.pdfIn PDF document text
    • https://bolomomotune.weebly.com/uploads/1/3/4/7/134762543/3607913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458407/normal_6026e3684cac5.pdfIn PDF document text
    • http://dostafood.xyz/why_my_whirlpool_dryer_wont_heat_upcumui.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/9142326.pdfIn PDF document text
    • https://potuvomominoneb.weebly.com/uploads/1/3/2/6/132683031/2599869.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/doluzuvemenuzisa.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/xesamifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_601b2c12569d2.pdfIn PDF document text
    • http://reduslim-officialsite.site/backstab_mod_apk_2018u5r9t.pdfIn PDF document text
    • https://wabiwuwisurukim.weebly.com/uploads/1/3/2/6/132682822/kedasidamupozitir.pdfIn PDF document text
    • http://mavpa.fun/calculus_early_transcendentals_4th_edition_rogawski_downloadg9asi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_60131a1e114e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_602ba4f0ee0f9.pdfIn PDF document text
    • http://rebelliona.online/engineering_system_requirementseyz9w.pdfIn PDF document text
    • http://themarkuzmusic.com/2826966536ui8vd.pdfIn PDF document text
    • http://sitajejo.22web.org/adjectives_word_order_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gisabolawavurad.epizy.com/poultry_feed_formulation_download.pdfIn PDF document text
    • http://lotapit.epizy.com/42142521072.pdfIn PDF document text
    • http://risuveliki.rf.gd/rapidex_english_speaking_course_in_gujarati_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aedb3cb-2e15-4150-8cbb-d29c47f7f8f5/xetole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0825acc2-b832-42ca-8fb6-4a5123fe9c94/hardest_harry_potter_quiz_youll_ever_take.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_off0000d4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 5228 bytes
SHA-256: a34ef9ea1230920fb3387b4482ea03863ad6f4a89a528cab30f8459ce487a48e
font_01_sfnt_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 10808 bytes
SHA-256: d5391b6f2709aef0e8111c514c50459ce7a4d56680b15d0a21f54f364e565ae8

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