Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0fa8f260f1490c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-05 05:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: becb314c3313d7def63bcda01f54cca6 SHA-1: 705e9a795192e96185a5963e67fab61461fcdd23 SHA-256: 0e0fa8f260f1490c2f5b042dc7d56d25d397e19b44300fce470c548b4437f5ee
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic PDF_SEO_LINK_FARM specifically indicates a mass of external links, with one prominent example being a PDF hosted on cdn.sqhk.co. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

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 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://mezovuduw.ru/award?keyword=how+to+get+gamestop+coupons PDF link annotation
    • https://cdn.sqhk.co/surikuzezun/HGhgRlg/zikipu.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/fFgcjix/jawixo.pdfIn PDF document text
    • http://manovina.mypressonline.com/the_maze_runner_full_movie_in_hindi_download_480p_filmyzilla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_603255ad62009.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/28436485991.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/Ljdgjgg/six_guns_gang_showdown_apk_award.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/honda_harmony_1011_riding_mower_for_sale.pdfIn PDF document text
    • http://vaxenovutejuzid.sportsontheweb.net/mfj-939i_automatic_antenna_tuner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5fcc5584a73df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_62a3d21837824c01b7593211a4a59993.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/buick_encore_reviews_2017_consumer_reports.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_a43beaf7847c490cb65dc24a17d3ef13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujesulad/gumejukowigasemirojuf.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/66253672076.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/55559905721.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/96926608377.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/coaching_log_book_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/biblical_dream_interpretation_dictionary.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_4586d5454f294f7a914201d30680127d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/javascript_from_website.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/thuthuka_bursary_application_form_for_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/negative_fractional_enlargement_worksheet.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_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 5176 bytes
SHA-256: 23f6601b92afe419c14928e97840d384fe62f5e230bed2ca31fa9beadc5f1ba5
font_01_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 10624 bytes
SHA-256: 5cfd31c01c7cbf2bb37f3999fad27f66799e7c35117af612e967de18bd60b070

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