Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0e9da5f3b1fd8b…

MALICIOUS

PDF

85.8 KB Created: 2021-07-30 23:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6901ce25e7cd89909153288a2bc58595 SHA-1: bb134959da0583b72e1a4a26a63673bcba24b0e1 SHA-256: 1f0e9da5f3b1fd8bd3e0a19e90899fa01cc56ff03a95748c8882d77708d361ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/6a9sfdrtnq1earf91r6fecokcp/pozigifepenas.pdf In PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b03c8978a67---kerataketasorenuvazes.pdfIn PDF document text
    • http://sbkf.org/files/files/nuwuvavodatewepexoredaw.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d5870ad5---49672729497.pdfIn PDF document text
    • http://benhvientantao.com/img_duhoc/files/zorokujoduvuzurenatira.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/81e4383808f3e8b42a3648aa087a2faa/dusefixoxeguj.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/h7rggsind2afockkfniea83ih5/wewirozunipepu.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/lufofirekigibafi.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f26c2e6239---lanobewegusedowasotexudum.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/fepazorinirufanitivig.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/datigavikufog.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/20804097893.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55b11c0aeb---dikosatugizozegumajedil.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a867d4406---zagavexibox.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/didug.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/38270533008.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160f7f1bd73466---juvufemujalakupigofol.pdfIn PDF document text
    • https://sce.tw/uploads/files/60e44d9436e4c.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/novar.pdfIn PDF document text
    • http://a2designbg.com/userfiles/file/tipaziwaxugesomibu.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/5678621acf7606479b2d40b3e47f518d/29400660883.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607956e761cf9---51667433573.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/vowitulokiwizupibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=samsung+smartcare+vrt+plus+ur+codePDF 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_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 11008 bytes
SHA-256: 205d4e998b59447aaa26d70dcf37010598f392f3cd263742010d827ce8af55c7
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 16944 bytes
SHA-256: 258001ca510fc511733dff375babdca1e9c6307b902de51f5c6e6c85e6be5e93
font_02_sfnt_off000131d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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