Malicious PDF — malware analysis report

Static analysis result for SHA-256 469b9b66be5ef15b…

MALICIOUS

PDF

88.7 KB Created: 2021-08-18 02:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 97b328a506a35a69ab79f5619242bf62 SHA-1: 049263e4a17bd3753d8ba20791861170e2b5c041 SHA-256: 469b9b66be5ef15b2137e9ca01746ba3ef12832e0add407c5b23395d1ee7757b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 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.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/dc0c7ccab53e41146a39eaf9ac1b262b/59365540295.pdf In PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/pufaxon.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcada313ff3---86260898343.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/zojexitakudafized.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/kesal.pdfIn PDF document text
    • http://regmac.net/userfiles/files/jidatibelod.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/99dcec99cb079d243440559b6eb270f5/86162132450.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/70718408538.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/mufirosovapererukidux.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/38067675025.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608808e7d3acc---guvisufilixidofugupa.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/56175710205.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wumamuniladevivisi.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/84809948607.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f4482776a---99088919460.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/bepexuveliwev.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/xatuzopisat.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/13842417324.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/5q4u5ah9ogpc4v0lfbmb0b54gv/22973239957.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b39fb9c223ffcbd5d50dfbd3e777d87f/65073201423.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/80886208824.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160810a52f0b0c---sogixudaweduvewuledup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=aap+baithe+hain+balin+peh+meri+english+translationPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 10820 bytes
SHA-256: 2fe189698e5f0688a3d0baf31be4f8917aa9d209af12049b8418d60da2936dbf
font_01_sfnt_off0000f456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C68 17084 bytes
SHA-256: 6f48b0a42c036bb011c995b5c951066aa20d191765fc49b5c7e045b825f0e978
font_03_sfnt_off000138b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B2 17824 bytes
SHA-256: 695a7249fe69c1e264a9f04f279cc876ba78b71353e4f0517ada88d181ef7c02

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