Malicious PDF — malware analysis report

Static analysis result for SHA-256 602d2b046bf9e5a1…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 09:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 732a12dc057f274a911dc7fbca781e03 SHA-1: 10f664e9de23d179f1e7ba0de18ad01cc963db87 SHA-256: 602d2b046bf9e5a164b46da8a939a777add202be0ee471c91235534b25de182e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many pointing to compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=managing+for+sustainability+pdf PDF link annotation
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/f991e83f4f27a0516f08081482e21016/98876518926.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210613055814.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/917u1h5gbl01pubmj0bkls1bp2/kafekomepabefafasosuvogif.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/23086894879.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/477fc021d5b5c825f9a6c03f368ac761/nodokajibutu.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/bikulasenulinozik.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2714d2d1d---60159353157.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/uq46dlil5cpskq7095cbvfc09t/pajixegafenes.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/j69pb71l6p4s53b50e530c9fs1/rijisupiniruxowib.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdb316f976---36451947084.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d7e88a04---68922686834.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/rarorelix.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160867ac8bdd60---53354914314.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/19250843576.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/41345247295.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d27358544aa---84119673387.pdfIn PDF document text
    • https://defaico.com/d/files/vevazirefaxexomobanogot.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/tabij.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1fd2f0ccb---netoruviramajiladufuwal.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/a8232bc46a0bd1f08d2a7a59c13629b8/77434343587.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/811k3cbjmn7bfd3v8f40aujij9/wuvebevabus.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/em216q93v3in3vt19q387j7si4/87958691678.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/nipig.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/xulabalawoxojuko.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/rotozolufelamifakidut.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/87469447937.pdfIn PDF document text
    • https://kildevangen.dk/files/72723060815.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/37knd43l1l6mt8t41bd0hut62i/42601414343.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://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_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 10888 bytes
SHA-256: 0f9699189a12aa55f7e45933e5fd64d152914db3dfbd983320fe7dd11bd421db
font_01_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 17292 bytes
SHA-256: 2482681ccdf8a06fc6da9f85e0653282765889a91ceb07d2fe468947ee4a458c
font_02_sfnt_off00013a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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