Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9e2e4ec7dc1045…

MALICIOUS

PDF

87.0 KB Created: 2021-07-12 22:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 77bfc15abef0ddf11fb91ef0c7cb0caa SHA-1: c462810149554df6514969409e72535fef4ca978 SHA-256: 6a9e2e4ec7dc10454b60bf42fa1b5e2a8f39249b159afe4e9b3a1a108039458a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074c0dfeec8f---zadidinemis.pdf In PDF document text
    • http://viethanit.vn/hinhanh/file/22446916218.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/temakexuro.pdfIn PDF document text
    • http://focostrade.com/files/20210701185138.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/9ru35bim2517os0vpg9ro82rq6/27944582484.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/2up4leqfq1mlrpui1jr1mvb6lf/63911286672.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/334a43ccdb4f9090d5024f261b813231/61006849716.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/hj12eeos2ojcdcd1bdcer7jntl/97931360250.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/xumuketuvovu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c775dd6d0---vabubog.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/xofojukugatedujiv.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/zirikedofujamonugav.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/pefinagoromotawazetefo.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be591bbf829---sekorarorano.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b585c41f7b7---84586724338.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6d44ce4e722686743a260cefd62fde58/jadulenalamutipuve.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f6868033f---tifomekiritalo.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/li2rdmbq61j6hgsk3373jlj1ab/79812115465.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5f84a999e---sunonemu.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/90451137432.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/92654396894.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f417abb92a---xaroteripexem.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/fudegutapoletofisela.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/benevekajigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=characteristics+of+sodapop+from+the+outsidersPDF 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_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 17156 bytes
SHA-256: 5e04691efe1e645ace6c5bb16eb2f6676a4afd255ff83353bc8b4bfcfb2c25b3
font_01_sfnt_off00011d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13560 10864 bytes
SHA-256: 2985e333ad04c3194741704aef6bac720ad63389fb408abaa579bdfa48bc18b6

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