Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ece3adea6922bae…

MALICIOUS

PDF

69.9 KB Created: 2021-09-13 06:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6da6c2a9e00b9f72ef5c0e93584fda28 SHA-1: fed9572453a8a2769d520a414f98784eebb125d1 SHA-256: 7ece3adea6922bae0abcc66e2a8995bc78eae4728f904f39502e86855cddf3c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it's an image-only document with an action trigger, typical of a phishing lure. The document body is heavily obfuscated, but the presence of embedded JavaScript and numerous external URIs suggests it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 1 text block(s), carries a click-outward action, and is only 69 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://synerhu.ru/uplcv?utm_term=dramacool+the+bride+of+water+god PDF link annotation
    • http://xn--lv0az70cxar.tw/uploads/files/202109051709119062.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/4955548036.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/56867120827.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/papukexefivawaxopatok.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/70165829478.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d42d24f32---reromenaxepopivap.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/42125372059.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/nujifiketesudabupuvobi.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/nufekaluxi.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///79345359431.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/3265256764.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202198_31011_857.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/kilasaworumi.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109040921524481.pdfIn PDF document text
    • http://aven.su/userfiles/file/bukajuteri.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/24346414296.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/80744549161.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa273b661b---27775037993.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/doragosimopiviket.pdfIn PDF document text
    • https://5udua.com/contents/files/sojajizirojijataxub.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/posufopemefapuzarif.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/xulutid.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/80509529933.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/96232985973.pdfIn PDF document text
    • http://maksimetall.ru/files/zifedamokaxetejumewox.pdfIn PDF document text
    • http://olivetheater.com/userData/board/file/64355922302.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_off0000b348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB348 10880 bytes
SHA-256: fbac2993973a4fcde0f7cd829a7fdfae9d5cdc263bbc62610289afc569f79f8b
font_01_sfnt_off0000cc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC42 14420 bytes
SHA-256: 31422cc004c9a4baaf7566fad995c6c5bec8267cc5fe97004281cc7bdf15218a
font_02_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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