Malicious PDF — malware analysis report

Static analysis result for SHA-256 68df269f84fbfff4…

MALICIOUS

PDF

68.3 KB Created: 2021-09-11 09:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d138682d3486f8b385c4e446337765da SHA-1: 8e5b7b25405646a1bfb79bdae820079561514e42 SHA-256: 68df269f84fbfff429b9a73ef6d5a899c2d67985006b09f7fad5ef28685003a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF sample was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a lure-like structure with a clickable action suggests it's designed to exploit vulnerabilities or trick users into downloading further payloads. The numerous external URIs hosted on disposable domains further support its role as a distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=parse+string+to+int+android PDF link annotation
    • https://mavachhaiphong.com/upload/files/97436266540.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d0fcca984---juwazeverifidazatufo.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/22618612244.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/febebanojirotajivejijupup.pdfIn PDF document text
    • https://unosms.us/userfiles/file/51947262171.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/mafiganafobegigeduveboz.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161313a567a669---11738394574.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/50064979719.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/081435104240.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/fojejasikumil.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/bujuvolewiborunitisepow.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/lanuzaxavut.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/1142613604.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/xosadamiwerulunapa.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/57370945932.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/dopezotufilawa.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/biweromedepumowumud.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/29185571117.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/sofudujil.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/78654328282.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1630518472.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/bemedo.pdfIn PDF document text
    • http://riversedgefm.com/files/file/43325398504.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210911011107_gja0f2.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/18574859672.pdfIn PDF document text
    • http://strandedtattoo.net/file/dogotopapeteresowuvate.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/getajolidobuj.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_off0000b3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A9 13168 bytes
SHA-256: 9b7cf124a2573166a842df379ac4f912947270aec9f5ea402ca08164c0b903a7
font_01_sfnt_off0000d3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EB 10376 bytes
SHA-256: 5c0b77266b16f1a29b56e3fbe66a0ca0f3ec8fc705055a85614ed7117b6e65f1
font_02_sfnt_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.