Malicious PDF — malware analysis report

Static analysis result for SHA-256 988315637c75809c…

MALICIOUS

PDF

72.1 KB Created: 2021-10-04 09:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 34427711ec533265320364ab07f26a99 SHA-1: c61005538704309adc1e030a7de190d85d2f774e SHA-256: 988315637c75809cba48acd61b8d9c6e9ed98b2524ee5ca9cece900f1ea595f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous embedded URLs pointing to potentially malicious sites, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://lg-palette.com/upload/files/luvoro.pdf In PDF document text
    • https://kidneystonetreatment.in/userfiles/files/ritumegag.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/fijowag.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/16656511020.pdfIn PDF document text
    • http://flathead.herosuite.com/userfiles/file/33412014295.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/lexuxajosukivobev.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/89980604651.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/sikamazosofojefatu.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/11770699883.pdfIn PDF document text
    • https://sayurhijau.com/contents/files/fazatelulonazar.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/82849989896.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/17765329559.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/vorabazusifuvejixuroveg.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/norasi.pdfIn PDF document text
    • http://chamaeleon-produktion.cz/www/files/file/25095251023.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/70276151240.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/20447036920.pdfIn PDF document text
    • http://mousike.it/img_ins/files/jibubi.pdfIn PDF document text
    • https://orangerun.re/photo/files/20451352323.pdfIn PDF document text
    • https://fishboat.hr/files/gavegodamakijub.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/xamamusesozutop.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/76380815499.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/ketinirivavuru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=principles+of+early+childhood+education+pdfPDF 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_off0000b1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F6 18352 bytes
SHA-256: 683cd72117fc864b1ceab5f59dc762da975c382d32d3c0605de858f67cb46fe4
font_01_sfnt_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 10932 bytes
SHA-256: d808640f16c9b573b77b5a564f658e365f9cb4234d29245f662d5920ccd547aa

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