Malicious PDF — malware analysis report

Static analysis result for SHA-256 5246cf6c4f721802…

MALICIOUS

PDF

83.3 KB Created: 2021-03-11 02:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 53161094d7918ab28eac581bf9b3934a SHA-1: a36afdb66ba697da45f2b6ff6a93d484cbe204ef SHA-256: 5246cf6c4f7218027867abcb459ec58c1522e534d7dab492e3abcda7c11c7211
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. One prominent URL, 'https://xajibur.ru/wix?keyword=super+smash+flash+2+all+characters+2019', is embedded and likely serves as a lure to direct users to potentially malicious content or phishing 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wix?keyword=super+smash+flash+2+all+characters+2019 PDF link annotation
    • http://fulusixavopowem.iblogger.org/cheddars_menu_roanoke_va.pdfIn PDF document text
    • http://test123test.xyz/witufufudomekodadedifaku0eyo.pdfIn PDF document text
    • http://gloslides.com/71620439623uodwn.pdfIn PDF document text
    • http://erethiztzj.space/clasificacion_de_excipientes_farmaceuticos4l9b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gudavipupax.rf.gd/51466119903.pdfIn PDF document text
    • http://xetoluwe.epizy.com/bihar_b._ed_exam_form_2018.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_deddf02f77b2432cb017db6dc739eb1f.pdf?index=trueIn PDF document text
    • http://teraropabu.epizy.com/10100395445.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/46355624444.pdfIn PDF document text
    • http://wigikel.rf.gd/how_to_price_a_vintage_guitar_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/gibikil.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_0645ac6c0c154eb9b7ef696bcd81274a.pdf?index=trueIn PDF document text
    • http://safutid.epizy.com/picsart_app_free_for_windows_10.pdfIn PDF document text
    • http://newixisuzale.epizy.com/xulamakivapobirepuwema.pdfIn PDF document text
    • http://dobejul.epizy.com/the_thirsty_crow_poem_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/tiwuneremuzeperisijazosob.pdfIn PDF document text
    • http://temekem.epizy.com/what_chemicals_are_in_salt_water_pools.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/temporary_employment_contract_template_free_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/cisco_packet_tracer_student_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/92590092953.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/35964450366.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_279edf8fd4744648914887847edb8de2.pdf?index=trueIn PDF document text
    • http://lowexulakapugid.epizy.com/gasenunixixamejatanemer.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_ef120f9a66a248d9bf3f24c07734c7aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mutirexa/nowaxamigarituguzeboxigu.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_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 5840 bytes
SHA-256: 8397c9f60598a6efd5f9c20d7188b5a19eaef3bdbc7ebf49d44754544c7bdc65
font_01_sfnt_off00011c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 10392 bytes
SHA-256: f434e5d7754e169aafdaa1ef2c9c4751aaa4157da98eca4f6ada94fe3c2db624

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