Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c79294885dbc98…

MALICIOUS

PDF

70.9 KB Created: 2021-09-21 02:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ed56d676b74219a91d0d643997eb38b0 SHA-1: b69ec16817e3d7a59be27fcf78ebcef2e77dd22e SHA-256: c2c79294885dbc9884dc7c2fe45ea2b698a273bf1a7afb9a136d27ef11224353
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The document's structure and embedded URLs indicate an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://amigo-shop.105h.net/upload/files/66716133842.pdf In PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147f8aa50c03---97990821117.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/2776265904.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/donalivavikato.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/40538245425.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312bebe6b84---xuwiretazerejubinox.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/piralazebesux.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/redilixilu.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/bojadamulelewome.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109061516161781.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/jefijalogixegiwanupokajo.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/6836918471.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/99990363725.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/zudav.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/95989078160.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ce1200dac---jazuleta.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/xikukepomaturixojuwokib.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/gosirasudazunowekanogaba.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/53865755596.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/67328126000.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/44647044542.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/diwobapojumulelanimoto.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/birijafopolisodepikiwipil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+cast+from+cell+phone+to+tvPDF 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_off0000b5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A9 15864 bytes
SHA-256: 86a17227bf9654e272e74fcb16295c46b7bb2fe686adb1ae3a2b72acf3a0aabd
font_01_sfnt_off0000ddd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD5 10796 bytes
SHA-256: e1facc212113d7a1f44d8ec14d7dec4283319232b18a0696962e3c93d673c6cb
font_02_sfnt_off0000f695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1