Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adad715d20a2ed6…

MALICIOUS

PDF

74.5 KB Created: 2021-09-21 05:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 01f9d67f79ae2e50ef91b0cc829e8308 SHA-1: c9a5af83cfb832f1fa700a2a5dc15779df458b4b SHA-256: 1adad715d20a2ed60bb4f9caf40b140b9669bd3c3ec3a6047d3ae5af59621c17
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing purpose, but the overall structure suggests it's designed to redirect users to external resources. No scripts were extracted, limiting the analysis of dynamic behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.
  • 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://farmacieitaliane.com/documenti/file/koresojopozexugijo.pdf In PDF document text
    • http://zentrumok.com/userfile/files/24885006976.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/70354980524.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/zigazejumuwufolepodalub.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/53864682177.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/93762221298.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/39373306906.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/mapiwejowizov.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/28630093500.pdfIn PDF document text
    • http://all-premium.com/user_file/files/87585112404.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/1882371316.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/tumirajivodorizoj.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/gixonosuxidul.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/aqr2a9hq6jlq6ns9tbd1a6gu00/56228912493.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/20951886219.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091515310373499.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/felejikomakefakojibetepu.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/51646519454.pdfIn PDF document text
    • http://canvangdientu.com/images/file/12651935683.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/15531611997.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/novukipamosasifaso.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16148196722932---64575241300.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/38758124650.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/88794665004.pdfIn PDF document text
    • https://paradigma.bg/uf/file/pomixiseliwimat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=boardwalk+empire+season+2+episode+1+watch+online+freePDF link annotation
    • 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_off0000bd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD79 16960 bytes
SHA-256: bbf6d5317f2066e1ce3f3ecba6afe0e835dccc8479b1ce526ac5d660d93f63ea
font_01_sfnt_off0000e97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 11288 bytes
SHA-256: cdfe96bc4f7b068945e39096f7d34ec26cefca7dfd5adac7ea165edf0575e093