Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce2bb175d1dc64d…

MALICIOUS

PDF

72.3 KB Created: 2021-09-14 13:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c4df256a59f37ee11700c346890efc2c SHA-1: 44263b74fd6644ea9d5b6b07a984a7cd118709b7 SHA-256: 0ce2bb175d1dc64d4ec03f7cf3915fc204caf3e6abda440f4bab9e98b74d20d0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for initiating the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://bilateralmatters.org/userfiles/file/36911881310.pdf In PDF document text
    • https://ijpdua.com/contents/files/luwiwoju.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/24455744905.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/mumiwonoxisomojego.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/xonoso.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/af10d616bf42f80e2e4e7db462a315f4/78350210565.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/fikedabedidotonuzezerit.pdfIn PDF document text
    • http://egitara.com/upfiles/files/51600232579.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/26045450438.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/87618893146.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/696815849.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/zavagadesawoluko.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/zexuber.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16139946bb3da1---99264172064.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/naluni.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/51929683895.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/35548809771.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/safajekebivuma.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/65674280335.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/16217022080.pdfIn PDF document text
    • http://195exim.com/datas/files/68469233908.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/72934630568.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/mozofujezow.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/zeziletos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=corriente+humanista+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B4 16256 bytes
SHA-256: c940ada602ec76dfe4027245f5aa41edb6df950be25c49176e33b5ad9471c1dc
font_01_sfnt_off0000e287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 10848 bytes
SHA-256: 9600e24314d485e2a541be74a3221021b4c781972fb552035b664f5d46b4265e

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