Malicious PDF — malware analysis report

Static analysis result for SHA-256 166e563f33b3fa8f…

MALICIOUS

PDF

81.0 KB Created: 2021-05-10 01:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ca3b9d38964d50dc9a1b35e45c399268 SHA-1: 69d2dbceb69138d321f24b657bd45ee711679413 SHA-256: 166e563f33b3fa8f5832febfdcdd5a3e53e52c239a0535c184f27c0fc35688f8
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 hosting and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were extracted, the PDF structure and URL patterns point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=garmin+zumo+660+cradle PDF link annotation
    • http://tamasolesodaj.mypressonline.com/koreader_kobo.pdfIn PDF document text
    • http://topcreditreport.info/metals_with_two_electrons_in_the_outer_energy_levell0cr9.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/hfnhajb/wilumeg.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/tupezorivonakotivofed.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/synonyms_and_antonyms_worksheets_for_3rd_graders.pdfIn PDF document text
    • http://kobasobapina.22web.org/android_developer_fundamentals_course.pdfIn PDF document text
    • http://sell-toclick.online/75773232334s0j1y.pdfIn PDF document text
    • http://naxekularem.22web.org/nican_mopohua_english.pdfIn PDF document text
    • http://doctorzlo.com/fapomopelugubixohml4.pdfIn PDF document text
    • http://shimano-stradic.ru/49715167067itsmk.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/igchjji/enerpac_porta_power_seal_kit.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/baukindergeld_antrag_kfw.pdfIn PDF document text
    • http://mukovasisoro.mygamesonline.org/lemifiporometozuk.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/jagopofegero.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/gonotat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bubezowi.epizy.com/kudelagapamar.pdfIn PDF document text
    • http://zogirifo.epizy.com/code_de_l_urbanisme_au_cameroun.pdfIn PDF document text
    • http://memezuxel.epizy.com/82418303553.pdfIn PDF document text
    • http://kusikegu.rf.gd/79049321473.pdfIn PDF document text
    • http://sosedowogizobi.rf.gd/qualitative_data_analysis_using_spss.pdfIn PDF document text
    • http://pawofavadutuja.epizy.com/without_conscience_chapter_summaries.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 5084 bytes
SHA-256: 40e6c5298b2454cbbafe7964d16d585469ab967814247be7c1a9555d3df2335e
font_01_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 10788 bytes
SHA-256: 945a3bd5c700dee5bae1a883b617b487e8ec7a01354676dde10d7c0474624cbf
font_02_sfnt_off00011256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11256 16064 bytes
SHA-256: e475b127670123e0992d690554a82105660adb0ac795948380663d104441f777
font_03_sfnt_off000126e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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