Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12fe6d778e2f064…

MALICIOUS

PDF

82.3 KB Created: 2021-09-23 07:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 94a921d1364b03db67523241f3408c74 SHA-1: 1ce1a428cb91046690eb0fc32912d5752b5eff60 SHA-256: c12fe6d778e2f064da5b21601d6c6f993efe909c1d68c1fb084fe5e34dc5cac4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Heuristics identified embedded JavaScript and a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to lure users to malicious sites or download further payloads. The presence of embedded JavaScript indicates a likely intent to execute malicious code.

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.
  • 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://toyotaautobody.com/ckfinder/userfiles/files/wiwepujolidelev.pdf In PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/wezuke.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/talut.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/6879553629.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161347e65644de---33073695530.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/varamuzilogor.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202109150228529933.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/56168315753.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/35074310521.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/6751003560.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210913205740889506485cay.pdfIn PDF document text
    • https://attack.lt/images/files/pilujimino.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/66626709781.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/26402774716.pdfIn PDF document text
    • http://rilta.net/userfiles/files/kexeromawowexelazek.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/37426187102.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf1354f0be---jawubewevupunajulonav.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/dupodasobegunolib.pdfIn PDF document text
    • http://usateatop.com/_upload/files/xakowegadasatasudezetil.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/52560123860.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/fovotowatugug.pdfIn PDF document text
    • http://oguraclutch.cn/uploadfile/files/16405416371.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b2a7a26a1c---16847524919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=sat+3+answersPDF 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_off0000de03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE03 10176 bytes
SHA-256: f9f5e9a8e3398a2fccb4f5e41c07f0c48172adf2dcd1b54a2abb7571a422462e
font_01_sfnt_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 17808 bytes
SHA-256: d020bb92a98a6816f9ac1e23f34552c091030cfe5ff2f73d739856460b3d5aa7

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