Malicious PDF — malware analysis report

Static analysis result for SHA-256 676e898483837b18…

MALICIOUS

PDF

81.7 KB Created: 2021-06-28 04:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 461d90947f1d9e056cbc4e6947f294c6 SHA-1: d86aad0201dfabd9c16a7673a0664592fefb8e1a SHA-256: 676e898483837b1818c4fa8805d4d2b074a3c38e4b778babf069dc1c40af4f24
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs an advance-fee scam lure, attempting to trick the user into believing they have won a lottery or are due a prize, which requires a fee for delivery. The embedded JavaScript stream and numerous links to external PDFs hosted on compromised WordPress sites and disposable domains indicate a malicious intent to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://irlanc.ru/uplcv?utm_term=earn+money+playing+games+cash+app
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088727be6302---jetogunipibofobaz.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/aef0bdb40563d4889a6e5ad1cb2276b1/mojupef.pdf
    • https://empezo.xyz/js/ckfinder/userfiles/files/98241737706.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/563cb8fb85870fee5d42bedc391f209b/lovezevagepusobamefawabab.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0a422e114d54b134b6016ae29a0c25c6/39504877052.pdf
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/putaxemukezaz.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9607f28805d1bd3c52b3d942fe32a3f5/20573182605.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeb9891704---52485122249.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795f997c93d---zixelixafobojumoxuwuxow.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609a24bee4051---55863887212.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/6r3g2guknu37macf6j9ospcfjq/16267252792.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099bbcdc25fd---96792069220.pdf
    • http://bishnutoursandtravels.in/userfiles/file/22824385957.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10dd41e5de---34618328358.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/t9r5q4ghgrl3jvpubm96s7umd6/99996050389.pdf
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/10414734493.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa53134cf---lotop.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/752dc7eb5a812e50a5e76d5c7182de8f/monadadowapinumufulerid.pdf
    • http://usmleworkout.com/files/file/9156618853.pdf
    • https://csn-alliance.com/data/files/zilokukitesunikelez.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aab774e4b---52597373871.pdf
    • http://vietsaovang.com/uploads/userfiles/file/vabomitowirot.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca35527f04---kizafiduduxanisozagawi.pdf
    • http://nguyenquangcomputer.com/upload/ck/files/18619679160.pdf
    • http://thegroverestaurantnj.com/userfiles/files/xulekifevisuxokorog.pdf
    • http://secretinvitation.net/images/files/13487660079.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160842a9945a98---rakejagomuj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda7.bin
31786db0b888dcfc8efd1e860dde4de4f787c7db4633e7cacb8d3d8cb04c9405
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA7 10820 bytes
font_01_sfnt_off0000f656.bin
6e555fac63a553d2bc0a224d965f912cb4f286b23b3a110dea04c7c5efcc0fbc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 16604 bytes
font_02_sfnt_off0001211d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1211D 16792 bytes