Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5975d7e4081657…

MALICIOUS

PDF

82.4 KB Created: 2021-09-14 09:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d08a8637919f5eff66a730dd2cb79f31 SHA-1: cf0d07f4d0e81db55781b7b88a8294901dfef7fe SHA-256: 0f5975d7e4081657267875f4b943c1649a5cc47f69a593430505ea1ef3aa3568
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The presence of a 'download android software to pc' URL further indicates a lure to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://drafthe.ru/uplcv?utm_term=download+android+software+to+pc PDF link annotation
    • http://gsxr.hu/userfiles/file/vipubetazezu.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/43111986617.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/kerujudodo.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/zabexukade.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136fe7f80e1e---gunefifalu.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/gutolu.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/49947141056.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/97578665383.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9254b71ef---59421748550.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/poxavapasanatusama.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/57597546522.pdfIn PDF document text
    • https://pbanerjeeservices.4digitmagic.com/userfiles/file/lanifulobitejutinusudak.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/60578661882.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/55337233431.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/jewij.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/69567638887.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139535f3f1da---57346788175.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/segagozu.pdfIn PDF document text
    • http://beijingteye.com/upload/files/98441523415.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/55750705542.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/tawekebisu.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613763217e207.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210906_8E9BB66621953F14.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/mivitagukaruxiwaguf.pdfIn PDF document text
    • 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_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 17800 bytes
SHA-256: 2b4eceeb93b08591c6704ad792f990ee610e5ed53709b9b461d86a5af7a0558b
font_02_sfnt_off0001238d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238D 10700 bytes
SHA-256: e93b1f8d9472792bbd2b96d13df52d1a2f0303282b23fca459e8b8bfbff589b0