Malicious PDF — malware analysis report

Static analysis result for SHA-256 722998c787aa2a6e…

MALICIOUS

PDF

78.1 KB Created: 2021-09-09 04:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 075c9cf0296fc6a2599fbd25ce3b9ee5 SHA-1: d4231b1d8744eb38570f08f86da34ad3bb9d5b1d SHA-256: 722998c787aa2a6eaee8879dcfa38dbb832c41a3b4a2261f2cb937022791f13f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which are hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://alituncer.com/userfiles/file/36169902250.pdf In PDF document text
    • http://www.sport-konyv.hu/userfiles/file/pidov.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/lexesegiporibivok.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131705b2e4b7---5436741067.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/kimekezakisolavas.pdfIn PDF document text
    • https://mkart.it/uploads/file/92901921021.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/26003888972.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/84386575257.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/jujivototumofan.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/41792647227.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/45938155445.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/lulimimezat.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/bowikusenifat.pdfIn PDF document text
    • http://chapelguild.com/images/usr/12662224782.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/49092846788.pdfIn PDF document text
    • http://dsfly.com/uploads/files/99657983625.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/jozaxuvurivav.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/6829183093.pdfIn PDF document text
    • http://wernitznigg.at/files/bemavajogakupemusupiju.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/2e89711643cf551b929f04a2456b037c/2625147599.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/19905687739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=boruto+episode+158+english+subPDF 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_off0000c8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C0 11196 bytes
SHA-256: bcac8a9feb17e39564256dca30f04375179d949ba0610763ead20c467861afe9
font_01_sfnt_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9A 18392 bytes
SHA-256: 47dc932d628f29e0b01b4cca91a6575ecfe6ff70a3336676e01227ab10c56e75