Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59d50473d4d5001…

MALICIOUS

PDF

89.3 KB Created: 2021-09-12 23:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fab379df29b8ce51c780d233321f7ff3 SHA-1: d9b71b011218e76b7ca3a3fae451ba42d537f791 SHA-256: b59d50473d4d50019791b2827d738bfbbcf0f20b0cb686b32d9183060e58d808
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it contains numerous links to disposable hosting, suggesting a link farm designed to obscure malicious destinations. While no scripts were directly extracted, the PDF structure and heuristics point towards a phishing or malware distribution attempt, likely involving embedded links to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ikt2494sbfc312d167mbvnmut1/sutomomawo.pdf In PDF document text
    • https://maintogelonline2.org/contents/files/rejuwikidudigurujimi.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/businu.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/22597577d8cc5257a6fe02475b2d36e5/kisogositu.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/12492003501.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/puzefimimoz.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/4200126826.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/74140061663.pdfIn PDF document text
    • http://nguoiquangphianam.com/uploads/files/63476737585.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/tefojiwojegewekug.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-3/20210903070138309819.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/mosoronulen.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/bugisutuj.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/pojekepabugu.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/semum.pdfIn PDF document text
    • http://pnalog.ru/images/file/92123654503.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/95369920544.pdfIn PDF document text
    • http://dsraxys.com/uploads/12531355996.pdfIn PDF document text
    • http://allier-genealogie.org/File:/21269488954.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/68091455502.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210907104657.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/gisagiguzofob.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/31629672430.pdfIn PDF document text
    • http://nineslash.com/user_file/file/wuxobavexir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=bright+memory+full+gamePDF 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_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 10656 bytes
SHA-256: 8b307343b2ab4efe2287120e513a7f773ca478a55a88c35733dd5c9e9ee47b33
font_01_sfnt_off00011163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11163 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12975 18128 bytes
SHA-256: 53bf46ec8944e80f3ae086a914c70ab5148ef169b720b0de0082b103cbcb3f0b

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