Malicious PDF — malware analysis report

Static analysis result for SHA-256 e918a359271b9d52…

MALICIOUS

PDF

74.6 KB Created: 2021-03-14 21:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2d5322e4ee01a2340158730fc8a089f3 SHA-1: 54d4abda1b56ffafec59d87054691c50236c481f SHA-256: e918a359271b9d52118fdb5d21bc1f4557e7de1f15913d690836755caca642c7
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. Heuristics identified suspicious and invisible links pointing to external domains, suggesting a phishing or malware distribution lure. The PDF structure and embedded URLs indicate an attempt to redirect users to potentially harmful content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://ponafet.ru/strik?utm_term=moto+buds+charge+sh067 PDF link annotation
    • http://sadinexiwa.mygamesonline.org/are_mini_trucks_legal_in_california.pdfIn PDF document text
    • https://legobunisazej.weebly.com/uploads/1/3/4/5/134501617/c87b58f30d7c0.pdfIn PDF document text
    • http://wiwafapudipib.iblogger.org/60460835864.pdfIn PDF document text
    • http://penageli.getenjoyment.net/skill_set_or_skill-set.pdfIn PDF document text
    • http://freshmind.net/cello_sight_readingaiq1w.pdfIn PDF document text
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/modiluvi_koxujoburuxif_kipitumudaloj_duzuvorefuvale.pdfIn PDF document text
    • http://xteenware.online/thesis_statement_practice_worksheet_answer_keyz8dbt.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/girar_pantalla_android_9uebw9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xufeguwopox.rf.gd/38590907922.pdfIn PDF document text
    • http://vibulowivez.epizy.com/48924986758.pdfIn PDF document text
    • http://jajuzefob.rf.gd/menowur.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_180b7e5ea7ed4341a7bc787f22c4b2a5.pdf?index=trueIn PDF document text
    • http://saxodanokijaj.atwebpages.com/how_much_should_i_charge_for_writing_a_500_word_article.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf27497b-e324-475e-af12-197e239f3785/38166171286.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_bc2c9b5554dd4892828958a2c47eaac1.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_daee0a599d5a4ecd9cc3f9187b462555.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c6b1895-082f-4e5c-82e8-7bc38e38ae62/el_guardian_entre_el_centeno_resumen_capitulo_13.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_564e8196bb854b5eafe64b8c8a21653c.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 5688 bytes
SHA-256: 022631c7b575eebacdd192d9ed304e5eec4cbef38fd3b955ce991b521e88dbc3
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 11260 bytes
SHA-256: c65a00586b4744befa7fb7cf42dc5534e7b52db3a32e74dac7ad3a403b5fa123

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