Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d27ac5bdc1a6cf…

MALICIOUS

PDF

82.6 KB Created: 2021-10-29 07:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 476c9ace6087176f153835dbf0d40a40 SHA-1: 1e11e523e426685f15e68dc3ded7611863ae2781 SHA-256: 96d27ac5bdc1a6cfa51aaf49b87e3f0778984b276cdd784f7a84db5e60227f0f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many hosted on compromised WordPress sites. These links form a link farm, a common tactic for phishing or redirecting users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495f39c9db4---92313940310.pdf In PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161597826bdc6a---tuxuderaso.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/ledagisovidenodiwebir.pdfIn PDF document text
    • http://liyangah.com/Upload/file/98406097731.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/6156acea99b58.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/wuxeradutinalatu.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/gagonolifogebezofun.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/85602295088.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/61960129691.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/doruzoxusaderu.pdfIn PDF document text
    • http://espokebar.com/uploads/files/buzobamobijusizevurekusek.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/jiniwinikugafixojalu.pdfIn PDF document text
    • http://mqskin.com/luutru/files/63645612294.pdfIn PDF document text
    • https://x-software.cz/data/file/vuvujuforugimebo.pdfIn PDF document text
    • http://synowka.pl/galeria/file/xizosimebetarapuladilupuk.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/mibijul.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/48386237225.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1617a1248d7ef6---menapaneloxibulo.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20211014_001850_123.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/3998503750.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/22869695793.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20211024185612.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/labajule.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/69324643762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/896FEnmJZlk/uplcv?utm_term=4th+step+packetPDF 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_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 18584 bytes
SHA-256: bd1c9d30001aa2bc16dc375a8b4732da2a39ba66741fdc5cc49661efcd2fefe0
font_01_sfnt_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 10080 bytes
SHA-256: c9d6a9d532931427989183a47bacaa8c67e89ad12b175b8af164bdca0a52ded8
font_02_sfnt_off0001250a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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