Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5d4cc39ed78d10…

MALICIOUS

PDF

89.3 KB Created: 2021-09-14 07:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ae79b3dc7e4d57ee8998ae2a650ed755 SHA-1: 5919ea946cf43ecc49ff3a1521527974b3d20b45 SHA-256: 9d5d4cc39ed78d10c158a0fb4451ef53fb73802b3ad178e96988994d7f9d54c3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d5de3ceac---6310664675.pdf In PDF document text
    • http://ort168.com/upload/ckeditor/files/nisanabovi.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/17989184771.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/nitirivapetu.pdfIn PDF document text
    • http://fruitsad.pl/images/file/97551347207.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138000210ec9---fesisanomufeveje.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/rinutifaxidibuzug.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613286e45f838---1478789551.pdfIn PDF document text
    • https://songhong.info/userfiles/file/xozujujasilofeli.pdfIn PDF document text
    • http://net-marketing.hu/images/files/53774268933.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/81600887693.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/fudonug.pdfIn PDF document text
    • http://theponghop.com/upload/files/lefasiselezivazegutuw.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc6a11d4c9---zojev.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336b54b47ed---betenapudepufav.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/34324859884.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/momibadejolezegigow.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/kajuvibo.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/wozowepagukugala.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613912f01c44a---dinududitudakejuvo.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/gofofobid.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/31862846147.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6f6abde29---jivobenejem.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161303f9e30ecb---finejumer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=unity+simple+android+game+tutorialPDF 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_off0000f945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF945 17296 bytes
SHA-256: 24cb2849dc0e6f4bd0607010e92df1ffc04ba620b94d5d1a2c2b93fc46a124c7
font_01_sfnt_off00012621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12621 10956 bytes
SHA-256: 4b334d9066a5a8744504e9eca23a36ef143bcdf8c01bcfd1950fa50f54e45ae0
font_02_sfnt_off00013f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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