Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a29b25c7e67ff71…

MALICIOUS

PDF

68.7 KB Created: 2021-09-11 20:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 51bad59b500735e748abae2b2ffd6b22 SHA-1: b0615dd9a22e5e5f1a32c6e86f3f2df68187c2c2 SHA-256: 9a29b25c7e67ff711c5d0c9b67c8ea32e3d1717db0c458d0d61e60e637918f74
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and a link farm pointing to multiple compromised or disposable hosting sites, suggesting an attempt to redirect users to malicious content. The document's structure, with minimal text and a single image, strongly indicates it's designed as an image-only lure to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 8

  • 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 0 text block(s), carries a click-outward action, and is only 68 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.
  • 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://sangtaoad.com/uploads/userfiles/file/viwunupegagapipalogu.pdf In PDF document text
    • http://arebiatours.com/uploads/files/dixepowofinifapanotel.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/74698258397.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613689945866b---83241419780.pdfIn PDF document text
    • http://kusistoconstruction.com/userfiles/file/soviliwola.pdfIn PDF document text
    • http://esipro.be/userfiles/file/nugonamasa.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/50440106691.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/41393472454.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/61730486323.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/mafubusa.pdfIn PDF document text
    • http://theponghop.com/upload/files/41239202996.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/talexetibezijux.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/xamafofojadazefofuvijig.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/41233249689.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613260acd38a5---48637750813.pdfIn PDF document text
    • https://hojoairport.com/images/file/12167524970.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/lofisigoxivunakevujanapu.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/7386046394.pdfIn PDF document text
    • https://domilot.com/uploader/files/20431660617.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/24013648796.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/96043206646.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/kilejejosiruxojivep.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/96412058778.pdfIn PDF document text
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/66562084646.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/3840844854.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/vizufixakesub.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/tu69usnqu2jtvv8nffgjp6k4c2/kuzuvupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=date+asia+mod+apkPDF 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_off0000b1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 10396 bytes
SHA-256: 33c51c051a180d18c8212fd5f45366ca6b04e5b9ac53ed340c613c4b687349b7
font_02_sfnt_off0000e180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE180 14048 bytes
SHA-256: 1df73a84fc82ddc73283b2adc041edbd245f2f0a4af27692c574f1be922ececa

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