Malicious PDF — malware analysis report

Static analysis result for SHA-256 d954176a1c4d3257…

MALICIOUS

PDF

69.4 KB Created: 2021-09-25 23:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fb6c04ab876991bc30b4dfffe5e2e0e0 SHA-1: 6cbca45de7b7afde0f7119a49b9d45c4b54b14fd SHA-256: d954176a1c4d32571e041d66551a3963c414566bfc3fe051c43ff2822236d0d7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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 https://groupunsur2.com/contents/files/69764905726.pdf In PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbf0747ac9---93953948263.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/25682374418.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/61938057416.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/surazuxomuvu.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/puvezetakegusununewufo.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ac6dee3e64cd19b92c597f97739e9709/69416882438.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53009196073.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/wezigo.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/79173111753.pdfIn PDF document text
    • http://vhz.cz/user-files/37234082429.pdfIn PDF document text
    • http://sdtr.mdrap.ro/fckeditor/uploads/file/mudixuvibisowupafase.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/dilotewosuxopevisen.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-23/20210923024936421720.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/57619969995.pdfIn PDF document text
    • https://mimpidia.com/contents/files/13387353881.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/37455831331.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210904_223508.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/35427796355.pdfIn PDF document text
    • http://le383.com/uploads/files/xezimatenovesoba.pdfIn PDF document text
    • https://termofriz.rs/files/59406435626.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/69416620551.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/14639015158.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/rapivenufize.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/12811627394.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/15820768540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=a+quiet+place+2+stream+online+freePDF 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_off0000b001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC818 10988 bytes
SHA-256: 9d3c26f520d4265036c71d6e70b193880e81b9b84ec345b1544096e238674d13
font_02_sfnt_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 15468 bytes
SHA-256: be9a95eb0a9be95647cb642a07b5dda8b8bdae711b1c52fda73725169d5173a1