Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e839358e248c1e9…

MALICIOUS

PDF

70.2 KB Created: 2021-09-01 20:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 622d08ae56ee18814cf404d77a344deb SHA-1: 54234c6373b2869a66b740cf4ca2d39aa9923fca SHA-256: 1e839358e248c1e9d3477ce1d7235e27d798ce88ab72f619f4f33907faba2c49
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, indicated by its small size and image-only content designed to trick users into clicking embedded links. The numerous extracted URLs, many pointing to compromised CMS uploads or disposable hosting, suggest an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=decay+meaning+in+punjabi PDF link annotation
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jifezugegosiloziroluragog.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c03b26af---xemupotijudobesuzun.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abcb82e1882---98788605067.pdfIn PDF document text
    • https://kimansion.com/uploads/file/romubekepezogoruniwimo.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a747a3af8c9206d38af433b7a18b4c21/nevaluwiseder.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/18306359084.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/lunudugakerebutukewe.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ac6a5688b---51152635048.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/guwovafugorunebavis.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/f011ee248996713cc346dfb70feb2b65/1458789186.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/79886200607.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/08e61e06dc40e954093386181f6feda2/50004762909.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609f91612a8e6---nobuwipotakimigedalifona.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/pijozotexelaku.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/20415287796.pdfIn PDF document text
    • http://dringraldi.com/clients/7/73/73ccc230e5ee2b020474e4a43bcd07af/File/rifomidepifidok.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af8be4b313d---38065166817.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/femefefewomubifiparosori.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e666a8de687---21557595233.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086e06dc243c---25150895715.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/fazoxewetu.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/bb1816fa4fe0525d5450c134cc07dfa9/5639911707.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b875702808---bubonobepupizadeji.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_off0000b74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5F 14188 bytes
SHA-256: e726307aac3368f2450ed0dd76ff8b03f40eb38bc0794e56568c373d1cf2bc06
font_02_sfnt_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 10668 bytes
SHA-256: c1e53f387474af4080af39faf26d0dc9f5c0f6fe90d7ecd96e4a7ac14a3d4fa6