Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e22f379f15a16e…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 09:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 374241bd220f4c826087cc11aad2f14c SHA-1: 191c8642047ca44c5f3831a1c05945d1af892ad5 SHA-256: b2e22f379f15a16e453831ad20a55fef7d2945bc2aa77396331434afb5df7ce7
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The JavaScript likely redirects the user to one of the numerous external URLs found in the document, many of which are hosted on compromised websites. These URLs are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070749a249bb---89863292090.pdf In PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/24156338609.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/91176786044.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a7b6314b0deabd5e3265266708ebc466/sosuvokozowuva.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161320f99477f0---zezinipuzamikaviluvizunam.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/e66badf5b5b43bcf2e933ba84de5bddd/17320534179.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/52411596961.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/rezimal.pdfIn PDF document text
    • http://fitviewer.biz/files/file/jonirowes.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/sagegokefimebiwame.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/012cd3d70b847bbc6ed4b283513f4843/sixiribawapusexonatod.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/80772159317.pdfIn PDF document text
    • https://fratellifurloni.it/file/jinaselowekabega.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/95982503902.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/77788107051.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/7330e8ecade41d0fc54380cf3c53d34b/kafopurajapenalalazodeli.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/kotatufez.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/bomerowotano.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021051807503617028.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/25273573330.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160849459ef60e---sibazuvaperudezebavej.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/dbc79f64074a9d2116fa037de8060c1c/vutuxopo.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/77553924947.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/13c788638b5d1cd7dda11389ab7bfc34/29869220381.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f67af9b3---bodasuwovenebelosafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=vertical+income+statement+format+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_off0000dab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 19932 bytes
SHA-256: aa70fda83697a7ab5aa3daa8953d2fee1ad70eb1ef947886781b265008b02380
font_01_sfnt_off00010ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE2 10748 bytes
SHA-256: a279ef8aad81c333b974771be897eedcde7113f66b9a8f325ab7e5a1afe92d73
font_02_sfnt_off00012595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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