Malicious PDF — malware analysis report

Static analysis result for SHA-256 229eb6a15c6d7c91…

MALICIOUS

PDF

75.2 KB Created: 2021-10-20 13:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 600120fe99b9e906c67bc17d9b959e09 SHA-1: 61040596e054c8086560f3e659ea59f330d98171 SHA-256: 229eb6a15c6d7c91ed7488a559655220377b07ba643ee4d3b54817b2d0a92187
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or distribute further malware. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://residenceraffaellotorino.com/userfiles/files/14012568484.pdf In PDF document text
    • http://rklatex.com/userfiles/file/guboditodufululawamove.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/45843243160.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/53163442164.pdfIn PDF document text
    • http://mobiliteit.nu/files/82492526980.pdfIn PDF document text
    • https://kawanmto.com/contents/files/wenusakuj.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/sozuvusagifobakizanos.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/xaviwotuxukezego.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/081c9ce0a47e5a28d65cf3fe181d7117/pilerikomosupak.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021092912294914.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/67017431751.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/45694463560.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/27500909513.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/mokepowegojivisebopa.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/zadonekepidetumizotuno.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/16144913731.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8c5dca27b---verumugiwome.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615130513c530---vejatixagogevu.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/22358887079.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/84924126746.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/fupafebokadegudelalisa.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616ddd5004fa3---depagekobuzokox.pdfIn PDF document text
    • http://juha.be/_files/file/99655068735.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/sifalozawebilafevadenidap.pdfIn PDF document text
    • https://avenue102.com/uploads/file/zakojijekiserurej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=lesson+8+practice+problems+answer+keyPDF 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_off0000bfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAA 17628 bytes
SHA-256: 2907a75b5183f2406c7bc44e782d7a373ce561d3c2eb2bafc00280a32cb3be13
font_01_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 11132 bytes
SHA-256: 6a7e4a2a7ad9dcf2b438cf2d73aa464ad4ebbd3a078eee4cf35a579169cf84d0
font_02_sfnt_off000106f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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