Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c626399f57559f…

MALICIOUS

PDF

74.5 KB Created: 2021-09-19 11:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c17c1eb416c75bfd3f6bccc2731cda62 SHA-1: f9def79262a4854cae8e3f6fff58dd3c1f446390 SHA-256: 58c626399f57559f27c4c2d300325718661104902280999f81088d0dbb49e812
126 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, with specific detection as Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, many pointing to unknown domains, and a heuristic identified it as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://eko-uklid.com/files/file/diloroxivedepo.pdf
    • https://unovosti.tv/ckfinder/userfiles/files/89877566004.pdf
    • https://flour.co.uk/ckfinder/userfiles/files/42015680967.pdf
    • http://waycreon.net/bhaskar/yii/upload/files/zutakutupofopuje.pdf
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/31088971423.pdf
    • http://atenngo.com/admin/sites/site/documents/bukanegoworenotisi.pdf
    • http://gemcom.org/userfiles/file/vetorurukuradiloko.pdf
    • https://drosamahetta.com/userfiles/file/pinugolovabovake.pdf
    • https://unitedfightalliance.com/ckfinder/userfiles/files/segagozu.pdf
    • http://my-hustle.net/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/tajej.pdf
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/lixewi.pdf
    • http://scandirent-new.ru/uploads/assets/file/34397963740.pdf
    • https://betsin.org/userfiles/files/fijunarusodagetet.pdf
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/dizexelafikemipaf.pdf
    • http://cachnhietwin.com/luutru/files/40420839713.pdf
    • https://kampusogrenciyurdu.com/file/54411481767.pdf
    • https://iphone-odklep.si/vsebina/kubawumo.pdf
    • https://www.idd.no/ckfinder/userfiles/files/9837256833.pdf
    • http://pwmtqatar.net/userfiles/file/gokimenolomuvurileguboniw.pdf
    • http://visusmarble.com/images_upload/files/88167647296.pdf
    • https://dollarplus98.com/images/upload/files/32622114670.pdf
    • https://vegan-eshop.cz/data/file/gabejedogadu.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/xuzuvinitusozixemeb.pdf
    • http://boston.pl/fck_pliki/file/zemuzizanogegogos.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=terraria+apk+paid
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1c2.bin
beaa651ba0cc044f7f964ef02da3665a871ebb391fd33f452db75a8d422ac86e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C2 9904 bytes
font_01_sfnt_off0000d7a5.bin
2973e4c6900484941c7e8cf56910f016ea0269929cc96856085a6d7f100f2ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A5 17456 bytes
font_02_sfnt_off0001049a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 16792 bytes

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