Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fbfba7c76ed020…

MALICIOUS

PDF

86.4 KB Created: 2021-09-13 13:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d3dba0fb1b71daef5b6ee3250f0b892 SHA-1: 8d1787ee829a61719ca37f1cc58b04ee9468dc8e SHA-256: 00fbfba7c76ed020b5376c1c20047377f86c8cf3d1fc6bdfe238592edd14eb6e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://pixomot.ru/uplcv?utm_term=hard+reset+droid+turbo+2
    • https://secolink.sk/userfiles/file/rafiroxemawatug.pdf
    • http://www.smartusb.info/images/library/File/84579287644.pdf
    • https://mobile-translator.eu/app/webroot/media/files/pemilesi.pdf
    • http://shopgraeagle.com/ckeditor/uploads/files/53285400546.pdf
    • https://melz-feu.ru/upload/witev.pdf
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/vumasixavewidoja.pdf
    • http://donkaew-furniture.com/ckfinder/userfiles/files/melixaxamupadexaweken.pdf
    • http://netcentricnj.com/ckfinder/userfiles/files/paviliraruzab.pdf
    • http://iphysiology.ru/upload/62497272211.pdf
    • https://deshpanday.com/ckfinder/userfiles/files/72939492073.pdf
    • http://avanti-kuhni.ru/upload/files/53125586046.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fd6589bdc---92765771290.pdf
    • http://plechotice.sk/tmp/file/lixixebetotudaziboluj.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/987f74a13a6f5664dd9ffc3b452e47f1/zivelizorifuvurelafeme.pdf
    • http://zhouzhuank.com/v15/Upload/file/20219732729966.pdf
    • http://steelfurniturecn.com/d/files/pakapinenajem.pdf
    • http://winhazel.com/indigo/ckfinder/userfiles/files/jasinenoxaluzowa.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/ua1jju9dgg6r3ivp2llrtcd7u4/xotugotoninaz.pdf
    • http://finalstage.biz/js/upload/files/susupakuwa.pdf
    • https://www.zolmedis.lt/ckfinder/userfiles/files/puzusolipi.pdf
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/77371558961.pdf
    • https://rizecanreklam.com/images/file/xotejotapizadobolumopejex.pdf
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/mirujinejibitinepugagi.pdf
    • http://aristosaigonhotel.com/uploads/files/8820680281.pdf
    • https://ever-progress.dacola.com/upload/files/xufozegetujapuro.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 16792 bytes
font_01_sfnt_off00010493.bin
ea0a0b75abb916101f6825ec01d0d232d8315180ea362ab264ab0c3d00685c98
pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 10444 bytes
font_02_sfnt_off00011c62.bin
6d2839fd7449d5a31e98cfe6a2116b148175199b864a8bcac8caef6bf340172b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C62 18576 bytes