Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadc4f0b46d88fe1…

MALICIOUS

PDF

75.0 KB Created: 2021-03-04 02:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8ea4203f4756d4df506e6779b451fb22 SHA-1: 34f752058779bf7118b8d148739c64658081cb96 SHA-256: aadc4f0b46d88fe163c1cd92008814cdc2e6e75edb2eaa1d4f0ee86e676e1770
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 URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=gypsy+soule+flip+flops+wholesale PDF link annotation
    • https://cdn.sqhk.co/tadawatimi/dhgieU1/pinout_soundtrack_download.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/dukof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500670/normal_602de83ac8186.pdfIn PDF document text
    • http://mosquito.codes/lirigoxapamomudikofasafek00c44.pdfIn PDF document text
    • http://gazzsheff.xyz/362788310566eyaa.pdfIn PDF document text
    • http://fitokaps.xyz/18340793900zypel.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/d6UMibq/woxexugipelakazuvagi.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/hh0hjhT/6644183870.pdfIn PDF document text
    • http://upgrade4me.com/converting_factored_form_to_standard_form_worksheetksw14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469863/normal_6001e22523907.pdfIn PDF document text
    • http://uanews.website/pirakupalepebunajujotu6ewls.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/iiij0hi/32602050966.pdfIn PDF document text
    • http://constructionhouse.info/jasikegezuvutofupireraskgoo7.pdfIn PDF document text
    • https://cdn.sqhk.co/dabigewom/34YYV7c/30639274923.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viwuwijagabote.myartsonline.com/arifureta_light_novel_volume_11_english.pdfIn PDF document text
    • http://puvepedep.epizy.com/manual_airdots_redmi.pdfIn PDF document text
    • http://fulapokop.epizy.com/where_can_i_buy_black_ice_cream.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/18980167938.pdfIn PDF document text
    • http://vudemiziwifimo.epizy.com/67724181488.pdfIn PDF document text
    • http://puzejiruniri.rf.gd/49112399448.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_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 5120 bytes
SHA-256: 5de772be3500ab0f8d4d440147d8e35c4069ba33514b8d65e9f438d225523dda
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 10560 bytes
SHA-256: 6a4570b796af020f55cc31162301707e916f1da3b9f63468a80ec463c4ff18fb

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