Malicious PDF — malware analysis report

Static analysis result for SHA-256 34042d76f0c140d6…

MALICIOUS

PDF

91.8 KB Created: 2021-09-15 23:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35bcd9fb6d8f1854c20d217a1dd5034d SHA-1: 0f7cca175e8b0da2491dc3a6d100dd572ceaf664 SHA-256: 34042d76f0c140d698c1aaae710da38f12c4c307b1c73ed7a29d68612ae896a6
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 malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JS points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=redmi+k20+pro+vs+poco+x3+pro PDF link annotation
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/27583284277.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/pamatafewo.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/59367104742.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/85666614487.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/58757041215.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/gimifawugovofeburefofifow.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-14/20210914083246697953.pdfIn PDF document text
    • http://belean.pl/userfiles/file/12406177771.pdfIn PDF document text
    • http://arablift.net/userfiles/file/54515028724.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/gadimi.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/movuf.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/wogefapakexogel.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/wolakenaz.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/lupifa.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/8839804276.pdfIn PDF document text
    • http://tai-group.com/upload/files/7164016230.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/wetozozegiwus.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613baf47da1f0---wilurasokulujusap.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///tuvid.pdfIn PDF document text
    • https://31app.com/userfiles/file/baredabube.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/lakoxurosusa.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/gexenasadudukofojulos.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/tobuwutuvusemanifetivix.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/mozadonefetedodisedixa.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DD 10984 bytes
SHA-256: a41493511c48c11325707d76aa891bafd631afa2e58e34035843185dc8a2364c
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 22376 bytes
SHA-256: b16586edf479143bbb75ceb271c671513e5469b04b8c6bf26edc1877d15ebba3
font_02_sfnt_off0001289b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 16192 bytes
SHA-256: 5bdfcca5b7f3d3b38464e2fe4322e4be0d09b406eb6f050755b279c196fbcba1
font_03_sfnt_off00013e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5F 2128 bytes
SHA-256: 442305b4f54fcca11131d7265c8084a350277580795f89700139d3a221274d69
font_04_sfnt_off000147fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1