Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3bf8726d2cf900…

MALICIOUS

PDF

68.7 KB Created: 2021-05-06 20:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 23d14df358a74b48a679e9c2fa78a405 SHA-1: e78d012b216d1f8834fba10f5da02ddf283b157e SHA-256: 0c3bf8726d2cf900d71daf0686d9c36f98f41134c6f42ffdaa1aae958823dd71
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to obscure the final destination and potentially host malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=the+choice+restaurant+st+louis+missouri PDF link annotation
    • http://xevidome.iblogger.org/44405428373.pdfIn PDF document text
    • http://lufosopaxukil.getenjoyment.net/car_carburetor_tuning.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/elisabeth_kubler_ross_stages_of_grief.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/jepipejomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://munogotisun.epizy.com/how_to_be_an_internet_millionaire.pdfIn PDF document text
    • http://xojudemavu.onlinewebshop.net/faliwulonimagowusufeb.pdfIn PDF document text
    • http://zepedijuva.epizy.com/rixabul.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/49601580987.pdfIn PDF document text
    • http://xeroxuzowi.epizy.com/42786338404.pdfIn PDF document text
    • https://c5c1e25b-3ca9-4f8f-aecb-0ee3b29cb37b.filesusr.com/ugd/f4fe7b_e1d7de04057e4416b11c2f36d95ecce6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82cfb5c-8841-4359-8368-3150f78920c4/65071670973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda96886-3f2c-4c98-88fc-d0646ef83cea/sexual_orientation_types_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66cbd9e-c64b-459d-b009-feb2fe9ec4fe/how_does_the_house_and_senate_work_together.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_7c1aa47da6f34cd7b8d4edb637277669.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_f3fbf66aaea54efe879a88a0827dfb05.pdf?index=trueIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_f2c1507002764aa6a5ef7cd7f243f12b.pdf?index=trueIn PDF document text
    • http://josekopiguvalup.epizy.com/tensorflow_python_tutorial_for_beginners.pdfIn PDF document text
    • http://tudozujuxijoz.rf.gd/basic_life_support_provider_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d60f157-17d6-488a-b993-62d1d6ae128f/how_to_combine_fundamental_and_technical_analysis.pdfIn PDF document text
    • http://vapanuwivodoj.epizy.com/wows_yamato_guide.pdfIn PDF document text
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_dd2d1654356b43c38c252cf3dc9b892d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5e31e5-24a0-4304-be97-4a865748cae8/10901303576.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_off0000cf68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF68 4988 bytes
SHA-256: 92c1fd2a178dd7c815e5efadcff81fafb175b1515cd45ebc90c5753f9c760cac
font_01_sfnt_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 10992 bytes
SHA-256: d95440be4b383503bfa8d8c8fba80eb29cf688af30f92cba51ed95cf260ca0b5

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