Malicious PDF — malware analysis report

Static analysis result for SHA-256 724e3dd213a9b402…

MALICIOUS

PDF

86.1 KB Created: 2021-09-15 18:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cd4e0cf7598a35c3ae06aae5ac9ee0f7 SHA-1: 3b7124522301ed17895301f819cabbbbcae817b1 SHA-256: 724e3dd213a9b4029235946b3549e03dd56c9f8da1aa71639a782cd5464d7731
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URLs, indicating an attempt to redirect the user to malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) and the nature of the URLs point towards a spearphishing attachment (T1566.001) used to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://irlanc.ru/uplcv?utm_term=how+to+tell+someone+stalks+you+on+instagram PDF link annotation
    • http://shannonlakeestates.org/fck_images/file/53820271782.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/tulezinuj.pdfIn PDF document text
    • https://theipbuzz.com/images/file/80481713524.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/rasugarufixiwomebogo.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/dubaxokaworinadilugaf.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/46820136196849f2dea0256e28ab80de/sidoxawato.pdfIn PDF document text
    • http://zuche0551.com/upload/file/xujuvo.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/pexamofasoro.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/todugofodutagobozoko.pdfIn PDF document text
    • http://www.agot.pl/upload/file/17878695814.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/gepivejek.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/tivigisunefapabawefovunu.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613b55a604f4e---5104299476.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/rasojadaforibazawup.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/sitozagejenig.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/jivasabafunese.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/7205193578.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/20074254323.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/kuxepizunimiw.pdfIn PDF document text
    • https://jss-moms.si/upload/File/30084928279.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/74697547683.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/42823736669.pdfIn PDF document text
    • https://olterus.net/contents/files/72419900645.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/rogizupowawimifavejako.pdfIn PDF document text
    • https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/mirubozugobefixixi.pdfIn PDF document text
    • 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_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 17960 bytes
SHA-256: f34d2f4e9e84f52e1e04fbe168e0ce07d727fac8e0e86b0ebd8d5695e3ddd661
font_01_sfnt_off000119ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CE 10836 bytes
SHA-256: 005208cc928051c0fe096d7bc18f2184863493f4411692f31b088fd7258f8a9b
font_02_sfnt_off000132d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1