Malicious PDF — malware analysis report

Static analysis result for SHA-256 896cf14d8f04ff0a…

MALICIOUS

PDF

83.1 KB Created: 2021-06-27 07:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c20e4ab457d989a6ba9acb1e510eb4f7 SHA-1: 41d628509301f8dddebab926e4d5ba88013b8872 SHA-256: 896cf14d8f04ff0a4a8fb2ba212f1d052f2d898f9218d22c9e4eb73b7d82f185
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, directing users to multiple compromised WordPress sites that host further malicious PDF files. The presence of numerous external URIs and the nature of the links suggest an attempt to distribute malware or phishing content through a chain of compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7745a7fd8d---riziwosisukogujilelizodoj.pdf In PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087b08bf2194---71658779240.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/a8864d228c31377845c3205d764e1cee/28529173449.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c86c0bfbd75e38a1b3ffa9e5f5410d92/bedipigurevi.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/zelajizu.pdfIn PDF document text
    • http://minhanh.com/files/kekosatafufejolakoli.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5fd5482d1ca0f94028dd76b296ca8302/zujebopote.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/445d0279bcbfa19659ebfe668083c737/43520701222.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050523140673499.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/53600303079.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/g45llbie0ugledkrqrj0korgi8/kidivikariwipibuw.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085765242888---lajibabesa.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/17711154150.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/6579096473.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf9am820itkhpv8cf1htt9uvd7/bonanupe.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607159ca0ab78---ligovowifoninatazuj.pdfIn PDF document text
    • http://riph.pl/userfiles/file/32102458540.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/60077480895.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5a6a5f54a---bigiwivudosawobuze.pdfIn PDF document text
    • http://bscartridge.com/pic/gifisijomilexasuvev.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7d7e320e---vikogidugonuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ouroboros+and+tree+of+lifePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/f394945f2420e7aab065c2bbc044fd14/gilofagikilufobeve.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_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 18088 bytes
SHA-256: 4a666b39fe8fdb67a222099cc1f4b12e0c4edfa33f61ad973c479ee52bd1fde4
font_01_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D1 10612 bytes
SHA-256: fcd01cb1fd15b7f1d5d2c6705ff85c35d4a8a2dd2fad8bde1c1d430aec5afd05

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