Malicious PDF — malware analysis report

Static analysis result for SHA-256 073031484124f334…

MALICIOUS

PDF

81.3 KB Created: 2021-09-24 08:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 43434edf2d54a19c60918ac3ef6a3188 SHA-1: 4115df6315e0a44f5c0f19fc54e90d7db7503eac SHA-256: 073031484124f334c2451f88a34fed2467fccb455a566c5317f090bf10b73963
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many of which point to compromised CMS uploads or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm. The embedded JavaScript likely serves to redirect users to these malicious sites, facilitating phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://honda-vo.com/upload/file/4931610610.pdf In PDF document text
    • http://a-aqua.fr/ressource/site-image/files/92484664688.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614983e4dd149---89560728150.pdfIn PDF document text
    • http://xtra360.net/campannas/file/36831185009.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/lubalamefuvumetesefebum.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/pijapo.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/zapiziviv.pdfIn PDF document text
    • http://01host.ru/userfiles/files/tovirep.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134504bc91dd---39034227528.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/96451095369.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/gemiviwekip.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161477f4969a47---81653555280.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/fejomavirazexi.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/59311802300.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/ruduxogukojifasaxi.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/kimuwodejo.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/kepenijigugadibenitawepu.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/62256242848.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/fezoluz.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/18736134692.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/melagolojumad.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/77659020626.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/12170577068.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347c6f36643.pdfIn PDF document text
    • https://lesura.net/userfiles/file/83232099339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=hot+chocolate+bandPDF 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_off0000da0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 17928 bytes
SHA-256: 1f0472f7e84c1003e2a56964ec67064c9f564b56277320d45c97fc7b8e59c8e4
font_01_sfnt_off000108f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12108 10236 bytes
SHA-256: 646d84770fe19ea041f1c5254c211f8a16b6fdbd95220b3d8549c1d6549226fc

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