Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46d69816ceccfc1…

MALICIOUS

PDF

84.2 KB Created: 2021-09-22 09:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 758159b8e3be2e5bb287b2d4f54ca2c0 SHA-1: bffc70c3326186958c752858dc00827e5c89f396 SHA-256: b46d69816ceccfc149ffcc9035fc19155346be25b7bc145a8723992e03bd7a5d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs further supports a tracking or phishing context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cricket+streaming+app PDF link annotation
    • https://mimpiindah1.com/contents/files/8823281268.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/97468492497.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614acf30d1f94---34157028983.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/powetip.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/mewabujinisukurajo.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/90314919808.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/44258384247.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142606d601c0---kimesepixaginavat.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/pinebebumafagerade.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/lowakerugudedanujekori.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/gogodonuwulafabumidowim.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/85775111341.pdfIn PDF document text
    • http://rydelko.eu/userfiles/file/gekuregaratesuzijikawimak.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/nenetudaloputitu.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/38707857693.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/tuxakobasogati.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/fomewowopesozat.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/42446088248.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/ridikufozovevetogi.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/zanurowi.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/39479465342.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aceb0e6626---giwamujunav.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/33233209675.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 10672 bytes
SHA-256: d6825e889acc6217ad2cb27785af175c70aae653b4d5cd404dc2fa650d3dfd47
font_01_sfnt_off0000fce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE9 18196 bytes
SHA-256: f1ab955debc81638c6739b9fdce9dd3e8315dc77ddd072908463ed153d82ba73
font_02_sfnt_off00012b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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