Malicious PDF — malware analysis report

Static analysis result for SHA-256 5117f1ee6da79b5d…

MALICIOUS

PDF

86.4 KB Created: 2021-09-13 04:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 68bc52b1d766081b214a8b3ae1af06c3 SHA-1: c10fdef0f9463d9c7393af1052f29c04a1394ba0 SHA-256: 5117f1ee6da79b5d3a99747f9a46f43f4c83515fd294877f627b165cabd7fd0a
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://orkoien.com/userfiles/files/70058503721.pdf In PDF document text
    • http://sten.kr/club/data/userfiles/file/20210912210258.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/tubalogozivixenarow.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/h8e2fpv0bgqcopq4lrg9b13h7k/6925996075.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/6389955099.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210912031935.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/34313373728.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/lapusonavexo.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/vajulutuxeti.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/79005728405.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139c686d720f---zefafisumogogapanam.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/xuwozupudasosemixofuv.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/93702746126.pdfIn PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/29849715718.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/famavukusoxakusariz.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/jadelogijubimenod.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/32156555704.pdfIn PDF document text
    • http://iphysiology.ru/upload/joxowikotib.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/57488918144.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/61334372261.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/glv8apr233omt6sr7o7bmvhra6/99809421287.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/jusugekodoze.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/u1vgki3hbev9avajl7j9rfogr6/86339782568.pdfIn PDF document text
    • https://ocw.tw/uploads/files/15545708074.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/2157888d9ca78e20bdaf129f756640bd/xolalutinunitofumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=bandit+queen+movie+download+filmywapPDF 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_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 17696 bytes
SHA-256: 11962ae2d0209cf6e5fcac7866ad282e3992ac8f61b11c65940b1cc8ac706a63
font_01_sfnt_off00011a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 10956 bytes
SHA-256: fec133e89edb8178bb9e0d1a10aa02321a10ef1951ea915335675cca03ebd5a0
font_02_sfnt_off000133aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1