Malicious PDF — malware analysis report

Static analysis result for SHA-256 8482187d19bc9dad…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 08:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 28195dbdb051e5ca798dfef74015633c SHA-1: 13ba7bbf59562743e4337921e04090bae1d23e89 SHA-256: 8482187d19bc9dad7425dcd8fe725503652e71cd80263008dff7611a5b68e7b0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.domaine-vrignaud.com/ckfinder/userfiles/files/motinuwamebimugibatuboku.pdf In PDF document text
    • http://ahkkpcm.org/userfiles/pinufezukexolebuwotawu.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/82342062013.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3864dd226c61bdbff094ca30ea465c27/zukapezaduwulowagedisuvij.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/50348803731.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/tekiv.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/40813668055.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/wikalojutidavakuku.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/giseporepilonipuwowi.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/55162950916.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/10877337405.pdfIn PDF document text
    • http://greenld.com/userfiles/votazivepofejinu.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/69316508229.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/41989095825.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/7962077739.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/tolofexevaleful.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/28932026404.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/70172310029.pdfIn PDF document text
    • http://vuason.vn/upload/files/bapefejodirumamivisivi.pdfIn PDF document text
    • https://izr.fr/files/50911488906.pdfIn PDF document text
    • https://solturism.ro/images/file/10898653849.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/xanitawituki.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/90461255886.pdfIn PDF document text
    • http://kaies.net/upfiles/210910165407755392ob05it.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/matera.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/rojitikobibenaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=2020+best+android+gamesPDF 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_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 17640 bytes
SHA-256: b4cc5b7c4c229152026369eee898f6fc1e5744bd808cba732ab6b494ba833f35
font_01_sfnt_off000110a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 10832 bytes
SHA-256: 33a901a0addef3ae2dc1f1ded653a124140e9db0a64651ce8988fc1d10188ec3
font_02_sfnt_off00012976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1