Malicious PDF — malware analysis report

Static analysis result for SHA-256 d105d9f69c8e58dd…

MALICIOUS

PDF

110.7 KB Created: 2021-08-09 17:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: af984e9eeba15f07a7af4a880e8a1303 SHA-1: 81ba6a8b52afefaca2cbec1e61cb8c78d37cd04b SHA-256: d105d9f69c8e58dd49369ef13fe49932cba67b307f754443139be0725481b4d3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many pointing to compromised websites or disposable domains, indicating a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the numerous URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=how+to+apply+for+amazon+blue+badge PDF link annotation
    • http://appli-veolia.net/ckfinder/userfiles/files/kimavifadepuvetisukuguriz.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/bezabelagobaferipixixoxa.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708e3a7d81d---tetidemisujawevowetekaxa.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/23316927493.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vujibazavokemikizixel.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/pobizej.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaa68ac0af---86240629772.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bef6d69cf93---towagikisanosuxupunawem.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/24354062007.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/korm7o8829i2ju9iahg36jbmn1/mumebedaba.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/fupofixuputuvemuwukidap.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/lipirubujekavewoliwu.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/degolinitaxijesarobonenob.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/fezedojura.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2e542da0f---rijilorobu.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/tarusa.pdfIn PDF document text
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/53838018641.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/wivuturedigotoxu.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/cft2qkm167mi3sf4n5rh3m97ve/56954002643.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/96270807266.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/1516510806.pdfIn PDF document text
    • https://comfort8889.com/upload/files/mupepozoxepufupowomexux.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/9426e82519eed45b4228031eb3127e1f/deporo.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc4c0194a5---1465493134.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_off00014d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D82 17524 bytes
SHA-256: d7ba3591643733a621553ee01825795a6dcf8cb1e039979ece6119936089d2c7
font_01_sfnt_off00017b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B49 11072 bytes
SHA-256: 4e9f8f5363f3ad1f79d67616ea0c207a970566a24d8af7284ae16ba76ff61750
font_02_sfnt_off000194b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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