Malicious PDF — malware analysis report

Static analysis result for SHA-256 feaf48df3632430a…

MALICIOUS

PDF

87.4 KB Created: 2021-09-01 04:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f7ab66ba56edf9c4d76e4cf159076111 SHA-1: 9a85a6bd082bf16ea0a5961114d8abc42d421aa1 SHA-256: feaf48df3632430af7d493822cd7856eeb67cc7272a4aef4ec61da3836dbfce0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised or disposable hosting. These links form a link farm, a common technique used to distribute phishing lures or redirect users to sites hosting malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://jslt.site/js/ckfinder/userfiles/files/91201015371.pdf In PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15560199633.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/24b033156e2f26440ff77c4ef370b135/nejejijujoresug.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/zogumopaxarasaferemazazu.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/60921429348.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b98dd5f42b---14668352242.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/15927459701.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-14/20210514152227939686.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6ae99f37---dekev.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/30126171708.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/dutivatoz.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/mosuviriwus.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/cijc1mc5iv6hc4688q6aoer4hb/mujajuperirakifajapajowop.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/suneludamepirerudezozobov.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a47e6741291---lipowonuraxalaruxiletugat.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/lifasubow.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/41738798890.pdfIn PDF document text
    • http://serenetransformation.com/clients/870552/File/54896654951.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/52291087743.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/2176263102.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ad010d99fbe---tujimadixuvefawolumez.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f5ad743b---genusi.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f40c359263f---livalot.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/81582972292.pdfIn PDF document text
    • http://montrealinkwell.com/clients/c/c4/c478fb9048b4d856ed1aa16e2301f982/File/96538925548.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/tj9l06usq01o7jq1u6q5orujqv/57345754107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=westinghouse+oven+663+manualPDF 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_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 10956 bytes
SHA-256: 475f17cf0c450314bbe0ebd79a4bab889de1810400d95fe487885309fa657145
font_01_sfnt_off0001098a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098A 17720 bytes
SHA-256: e6d2ff75cc4781d144f7b72b9469f086120632d78b60fa5ea9d542422541e321
font_02_sfnt_off000137c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.