Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0cec2252b38174…

MALICIOUS

PDF

87.3 KB Created: 2021-03-15 13:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fdfb2bd94da1a8cb305ab72ca1a1ac0d SHA-1: c8c1c1901fbf6d1bd576d15d2bffb6b75c0feb3b SHA-256: bf0cec2252b38174521c49719553513c68186df79d570e495db2f26fcb8c630b
136 Risk Score

Malware Insights

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

The PDF document contains a lure related to educational content ('hatching cross hatching stippling worksheet') and embeds a URL that redirects to a malicious domain. This is a common phishing tactic to entice users to click on malicious links. The ML classifier and ClamAV detection strongly indicate maliciousness, and the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=hatching+cross+hatching+stippling+worksheet PDF link annotation
    • https://kisetizep.weebly.com/uploads/1/3/5/9/135992433/95db4ce55be1.pdfIn PDF document text
    • http://health-top.ru/208497306943o1wr.pdfIn PDF document text
    • http://ionatr.fun/dozojafevogamalx6zfz.pdfIn PDF document text
    • http://kabakotunaze.iblogger.org/chaahat_movie_300mb.pdfIn PDF document text
    • http://x-bionic.shop/23599221006o7ubn.pdfIn PDF document text
    • https://sirukume.weebly.com/uploads/1/3/0/8/130814715/kotipidatuvomuwaba.pdfIn PDF document text
    • http://fubewakixodi.22web.org/undergraduate_thesis_in_business_administration.pdfIn PDF document text
    • https://wiperuzikenod.weebly.com/uploads/1/3/4/6/134694852/9fd8c000.pdfIn PDF document text
    • http://rubisteq.online/diastasis_recti_prenatal_exercise6fh73.pdfIn PDF document text
    • https://peminikagi.weebly.com/uploads/1/3/1/8/131856713/tumukotetovopibaxu.pdfIn PDF document text
    • https://pekowemorexoxuk.weebly.com/uploads/1/3/1/3/131380284/tadabeterasi.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefogitoveni.epizy.com/tutexeruwot.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/moto_g_5g_review_ndtv.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/jefogizasa.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/navy_seals_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/bhola_bhandari_ringtone_karna_hai.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/gexuxudotowizade.pdfIn PDF document text
    • http://rolexewosuvasu.epizy.com/pictograph_worksheets_grade_5.pdfIn PDF document text
    • http://gisatazab.rf.gd/cestino_su_tablet_android.pdfIn PDF document text
    • http://xukosabezapo.rf.gd/ginuzemogenilew.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/93880609455.pdfIn PDF document text
    • http://wexejobi.rf.gd/23378587058.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD6 1724 bytes
SHA-256: f4ac48c347a7ac88ef2e1c9370862c08498d022f54b507d818d14dbbb882810a
font_01_sfnt_off00011641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11641 5312 bytes
SHA-256: 97fabad92ea6840def3cbdca3719893b81dea39994e2ac32b518e1974335d585
font_02_sfnt_off00012861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12861 10808 bytes
SHA-256: 4bf599738b228bca9b8e70bda313867195c7548e4a0225e493a221e3620e9fcb

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