Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4c7c25ba286cf8…

MALICIOUS

PDF

88.6 KB Created: 2021-07-21 18:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5fde3f1fa17d6f579d8335503d39911a SHA-1: 1d25721d3691c8bf92bb3c735e9738300d2b8141 SHA-256: 9e4c7c25ba286cf87efada1b1b760c57c576ffe56fd87e51c5043a111a7901d0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload locations, suggesting an attempt to distribute a payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. While no scripts were directly extracted, the PDF structure and link farm indicate a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kvkumariajnkvv.org/singhania/downloads/file/46375465750.pdf In PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2922fc57a5---32519634685.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/23817789271.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/cc28207407a2b087e88669c650e20b2b/61134762334.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa474dd13b---86107224608.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ac82c8ecd---48544224787.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af64fa2e304---vuwoziwevi.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ing817p6hc2f3va30ger34u46i/2282449806.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/i8je4l11vjt064csp74krj0eod/bebugifufinelivegilufot.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/7dd336ec315fc5ace0883cd46bd5221d/zosobisusitaxi.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/xojar.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609251ea262f8---68370275315.pdfIn PDF document text
    • https://majubesar.org/contents//files/67692430050.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/49d958e82dae1999d5ef633becf92cfb/60015603182.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/43500756509.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d68557ad5---52267609615.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-1/20210501230359785864.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/91465402684.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b83ad1446---50151759363.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094833b43280---boruponogubupuzagumefuji.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/3992737ea873a08feb57a2e76061f4b2/98960034906.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=need+for+speed+shift+2+torrentPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D5 10484 bytes
SHA-256: d8df64b79a82a20af7f75392cc261b1e13a3ebd4089d3907acc84e683c24ed5f
font_01_sfnt_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B8 17616 bytes
SHA-256: 6a0c253e5ad1a87a28a14b9f1d331dbfe80757cb6eeb3a767af9d5adbde47ba3

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