Malicious PDF — malware analysis report

Static analysis result for SHA-256 4273d4ad14856a12…

MALICIOUS

PDF

83.6 KB Created: 2021-03-27 23:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0c06febb9a3508702713b84e97578b0b SHA-1: 133283474bed5aed1fa2064fa2c9b5fb23df208e SHA-256: 4273d4ad14856a12d21eae7b7b5a2ca16d1d129016e61173925ee2867c5e0d1f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://ponafet.ru/123?utm_term=archero+boss+guide+chapter+5 PDF link annotation
    • http://reestr.site/bapolilivesiwerilakz8xe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_603af7d79e674.pdfIn PDF document text
    • http://francobusiness.com/ecuacion_de_la_circunferencia_ejercicios_resueltosqnhks.pdfIn PDF document text
    • http://org-fruit.space/guzarefetevapvyk16.pdfIn PDF document text
    • http://trokot-newshop.online/homogeneous_and_heterogeneous_mixtures_worksheet_answersjcf5b.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/english_vocabulary_list_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380528/normal_5fdc4eef20de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_600a9d700e6f8.pdfIn PDF document text
    • http://lightstart.xyz/is_my_eotech_realx43ni.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
    • https://s3.amazonaws.com/lososimap/office_closed_for_thanksgiving_sign_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/30042904469.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_183dbcc5abfc4d4b9052705360b3765b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/36693536994.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_e2af03dff30745e68111a3a7ca6b1d9e.pdf?index=trueIn PDF document text
    • https://c9ecad83-e70d-4e71-84d8-0086c45344aa.filesusr.com/ugd/01a317_5347415f4ee745a3afd7b80950745b01.pdf?index=trueIn PDF document text
    • http://pudosuvosav.atwebpages.com/zefobi.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/boxing_tips_for_punching_bag.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_2f865e3974654c72871640a8592f04fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/bandook_ka_photo_hd.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_a176f2a7ed744f28bd0b757a87d513fb.pdf?index=trueIn PDF document text
    • http://rabatelekovufar.myartsonline.com/40849435396.pdfIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_8e3fe928893e4a7e9a0a157d44fbed4b.pdf?index=trueIn PDF document text
    • http://puribisipup.atwebpages.com/91993769228.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_9466222f2d1e4d7ea5e6bcb3f37ad8ad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 5332 bytes
SHA-256: d80aee25091ddb2b89bfe31b2530f640d6168a4ba4c4c4bc6eb09912ec6326cd
font_01_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 10932 bytes
SHA-256: 9354288f58c1cb06f5d11a50014376d6eb983c52e90e2fd05fca63c8b3be3a64
font_02_sfnt_off000132fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.