Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d47c0abd82c2b6…

MALICIOUS

PDF

85.9 KB Created: 2021-03-25 03:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c6067ded6015af22c69d734eb202a8a5 SHA-1: a1d7f2e014cc9628a3a575505b507a219d70a52c SHA-256: 86d47c0abd82c2b6ef13108af4673f0b1f8400001f9ff9a71464107ec18bb6f4
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable hosting and potentially malicious domains, suggesting it acts as a lure to phishing or malware distribution sites. The presence of external URIs and link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/wix?keyword=jim+crow+worksheet+quizlet PDF link annotation
    • http://beruvutekimeged.22web.org/format_of_appointment_letter_for_employee.pdfIn PDF document text
    • http://vinnipoh.space/812642519806tzek.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/8188955391.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/92824366769.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/hihLyji/wesatosafunovef.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/qhjgejf/43020532306.pdfIn PDF document text
    • http://rakuxijewimafud.22web.org/email_anrede_englisch_formal.pdfIn PDF document text
    • http://rivugijunamusi.mygamesonline.org/lenunazoni.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/ijdDyjh/kuvaruderufovamot.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/how_much_does_it_cost_to_coil_bind_a_bookl137p.pdfIn PDF document text
    • http://autobuff.xyz/8636994508vgfub.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/saag_ascites.pdfIn PDF document text
    • http://hellesypakk.online/16467955829s8ul3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_a04511381f5d401281a2d225e1722cec.pdf?index=trueIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_6418deaacf7b4a12ae772a58a97fc490.pdf?index=trueIn PDF document text
    • http://newepizudef.atwebpages.com/aerodynamic_car_design.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_048934ead46643b3a04c39fac0da37c7.pdf?index=trueIn PDF document text
    • http://jifimurosesapu.atwebpages.com/meaning_and_definition_of_mathematics.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/how_to_do_rotation_on_a_graph.pdfIn PDF document text
    • http://kixixobaso.rf.gd/91038559333.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/watijo.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_16e4efcdf9a34b80810cc57ac1cb80dc.pdf?index=trueIn PDF document text
    • http://nawezupuzevise.epizy.com/bts_guidelines_on_pleural_effusion.pdfIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_a9454e6a9727400496389f5f34c98b62.pdf?index=trueIn 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_off0000f838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF838 5152 bytes
SHA-256: ed834e694282d23808ec1151238eaf76aa08002e1c6d48a9ccb8d38ac7e9476b
font_01_sfnt_off000109b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B6 12708 bytes
SHA-256: 30de46268e2187d2a29f083fe17f7a323c0aa4e5f6616d17cc8a6e3c1332436e
font_02_sfnt_off00013464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13464 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67