Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c554f30f815eceb…

MALICIOUS

PDF

83.1 KB Created: 2021-09-16 07:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b0526b91937b3cc086998c59330c58fb SHA-1: 2e24545f3d0df3cb1729d943facefa5ec3a187c9 SHA-256: 7c554f30f815eceb6bb2a791bb71d52b33217c4517cabe78f05caa8c29570795
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded links, many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://e-motorcycle.tw/upload/emotorcycle/files/60683127388.pdf In PDF document text
    • https://bloomland.com/sites/bloomland.com/files/7843030177.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/52588386868.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/zibozina.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631413515.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/tixotanukavak.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/90672689170.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/zobanidevexanexasowilal.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/846181016613fa3c35c9f1.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/tefub.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/lolujegudevuzafewemed.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/b87762d82e75b15d7bc7f1452defd575/62482109585.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/xujufub.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/tinetaguvawovuzo.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/5733564080.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/dukababof.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/tapobobuwesofiviwil.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/ragowopumigozojotel.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/7978316417.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/jeluzukomasowukop.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/1810014087.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/21565708091.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/dfc78d7f97ee20ea9693623ce8cf7ffc/89696146279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=face+swap+app+download+apkPDF 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_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 17740 bytes
SHA-256: 8b9fccfdec2dd177d2abda51341d15de4bb7134a17cad88524cd130fb017a0e8
font_02_sfnt_off0001258e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258E 10372 bytes
SHA-256: 81a46922759e59a1caadb2e08fe61b479831f991bade02db231a7bf792725100