Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3aee2aa45bb2560…

MALICIOUS

PDF

67.5 KB Created: 2021-09-26 12:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d260d60236dfcffcf352136b6e044aad SHA-1: 37b164ce53f58b8163270b0b932ded7eaa2a0aa2 SHA-256: b3aee2aa45bb2560a7780dfa1ea44aa05afd48b5caa3a728d246f36655490c0a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82277032688.pdf In PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9987b6aaef7d29eef8ec9e4f1ccb543f/33113984948.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/zutajorufigem.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/88973678480.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/46790435798.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/vasejiwelujofupa.pdfIn PDF document text
    • http://xhzhengli.com/upload/nobasevufuf.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/74109736486.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/56214380821.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/2851396021.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/81972782270.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/botozojosine.pdfIn PDF document text
    • http://ghefootmassage.com/fckeditor_userfiles/file/91002296234.pdfIn PDF document text
    • http://coca-colalife.eu/userfiles/file/bebinowadajugirasirafa.pdfIn PDF document text
    • http://imbirimbir.ru/files/nufutajudaxoziw.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/getijatemarujowemuzewoveg.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/pukuxeninobevegobub.pdfIn PDF document text
    • https://thebottombillion.com/business_school/uploads/file/kikobapozetagipuga.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1614531b67ed3d---gigofogujojoxez.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/rupusoze.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210901110626.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/livatoxanedaxozudozebub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=my+cafe+cheat+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_off0000acb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACB7 14236 bytes
SHA-256: d941ce7e9c7acd72a1eeacf6f9c46d37a9e4f7d9060c44ebc660d6dbf036a81e
font_01_sfnt_off0000d03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 10148 bytes
SHA-256: df7afaa5a72a8112af76bbadb30d6ae807228997891a463c2941631019ebd01d