Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b0e28f0499354d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-15 16:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7f97ae9485edea852b3005db54fc10c2 SHA-1: 1671e560598091fb108633f334fcb55677a61f46 SHA-256: 07b0e28f0499354d348a5a6e4e4465d0de4266559f41de7272c5631f91eb84c2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates a pattern of linking to malicious content hosted on compromised websites. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://consoles-a-gagner.com/fckeditor/userfiles/file/buvawuba.pdf In PDF document text
    • http://nyett.hk/uploads/news/files/77619291939.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/rajam.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/74817168136.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/kutanamapimef.pdfIn PDF document text
    • http://chieucoingason.vn/files/68997774400.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/51998631972.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/naworem.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/14806154711.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/fojanajadadogoketevuseke.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161379950d65ce---mikezusose.pdfIn PDF document text
    • http://njxinbell.com/upload/files/11712262502.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/8096763341.pdfIn PDF document text
    • https://strategie-forex.com/ckfinder/userfiles/files/59053384469.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/72rg373v7tsi5jc20ockmeh674/35538644721.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fc6f589f6---14499532891.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/wajaxukoruwajip.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/8105157387.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/28183850031.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/80085764115.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/rixaxowivoli.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/zumekupotojukivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=family+and+friends+3+american+english+pdfPDF 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_off0000da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA23 11112 bytes
SHA-256: 482deb1ece7f8ea4f1f61766fa6f3458ee0f9e32c248fbcdea170d279d9f5be6
font_01_sfnt_off0000f3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 17736 bytes
SHA-256: 5f2219c9ea9bc112828238059397aa21326ddd244ae7eeaea992d182bb94e7e4