Malicious PDF — malware analysis report

Static analysis result for SHA-256 47891f4818e9febd…

MALICIOUS

PDF

80.1 KB Created: 2021-03-22 01:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c24de33652c5ba24ed84a758c2dcd560 SHA-1: eefc96975b7713cdda2398485b40877c5b968615 SHA-256: 47891f4818e9febdc28fef75db03c68ddb0f980c5d948803fabb0765fc12e99f
192 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URLs and the file's structure suggest it is part of a phishing or malware distribution campaign, likely attempting to lure users to download further malicious content or provide sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://yafferge.ru/wix?keyword=tolland+middle+school+lunch+menu In PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/gibelajupu_tuzitugaxaxav.pdfIn PDF document text
    • http://zawomuxe.iblogger.org/wijidup.pdfIn PDF document text
    • http://geleostone.online/genie_intellicode_keypad_setupd5v06.pdfIn PDF document text
    • http://keniworu.mywebcommunity.org/zanole.pdfIn PDF document text
    • http://taptopbot.com/gbc._emu_apk_1._5._37_downloadjv7zi.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/7835214762.pdfIn PDF document text
    • http://bofesota.66ghz.com/zip_archiver_free_for_mac.pdfIn PDF document text
    • http://grizhoff.ru/apod_nasa_gov_19th_july_202099dzk.pdfIn PDF document text
    • http://amsidgi.xyz/wizafijajotijigonazaddow4b.pdfIn PDF document text
    • http://fizebiredasibi.mypressonline.com/ruzinuj.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/xeviso.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/orion_cooker_times_turkey.pdfIn PDF document text
    • http://xteenware.online/bise_grw_11th_result_2019_gazetteifyno.pdfIn PDF document text
    • https://fojeketilow.weebly.com/uploads/1/3/1/3/131379262/dazukusixeselebuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_c72aa9d316d44db59be41f3dab1eb02a.pdf?index=trueIn PDF document text
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_3de858accddd403fa419a3bf83da14aa.pdf?index=trueIn PDF document text
    • https://2ed9768e-82a7-41f7-bc91-4b86d8d7aa0f.filesusr.com/ugd/bdbd91_cff0139f4fd74b9ab28176e69c644b2d.pdf?index=trueIn PDF document text
    • http://popeladidet.epizy.com/verbal_reasoning_questions_and_answers_11.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 5032 bytes
SHA-256: ec11ca9eabd6610ada3b74e2f8056be43248522a0b1ea31d7044d5e3b3dbafd7
font_01_sfnt_off0000f771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 10644 bytes
SHA-256: 2793156baa4e258ed187ef1f1ce9855444a6c804ab7672a9791e88bf1002a610
font_02_sfnt_off00011c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0A 16448 bytes
SHA-256: d29843b9115938ba1e884a242ccfb4b3877a004ebffaddab38f0bbbdd3a47912

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