Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e80f101020aab96…

MALICIOUS

PDF

93.9 KB Created: 2021-09-07 01:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d77ee9b9600cc65b9508c35d4d8df20e SHA-1: 0a96d0505b2f6952e669448eb19835f42e21070c SHA-256: 5e80f101020aab96b59297d5b55438e53b0ff719e4b54b9c8bba0ceaf4e23ab1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and compromised CMS upload links suggests an attempt to lure users to malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/39c4e1f463f57b5a12afe9b48f861ba8/jitiwoj.pdf In PDF document text
    • https://onlinendttraining.net/files/90721849020.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/c707c899b845648808919b4db39a51dc/7171736610.pdfIn PDF document text
    • https://thenavyaindustries.com/ckfinder/userfiles/files/36293176644.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/59990503159.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb9b26cd4b---tisote.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c93733d022c---32804197591.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/xilasuwisup.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/59de4adac6315aa89e4579420300d094/xugix.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/fejowawopakanusib.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/u1iu26j7jc072vo5m079thofb8/21222343347.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/9e58ddd02d23fe9d76357cffa45031f4/kakuz.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/t4ssrvi1g1er7ae0gf607s2v5d/20088550037.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/godisetimilomavut.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/4abb6c30ea73bc771480e9779c7e6a05/purovupafuvemubibajepi.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/bevivozinimapunepiw.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/o885s67r8cb8rt3l71jqa85755/45383108565.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/gifatan.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf1271958d---vojerig.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/66539997412.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/sikefevokuzedetawagabama.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/43077181797.pdfIn PDF document text
    • http://yulintimber.cn/d/files/9045454357.pdfIn PDF document text
    • https://businesslife.com/content/file/subajezidopedanefozura.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/27528511071.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4ekli6arqrgfs4dr7te2st00v0/90014542656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=l%27antiquit%C3%A9+classique+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_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A54 21320 bytes
SHA-256: 37910f2a8eae9a7ccea064b54ec9af2521690f5a7aa1d2cbb5fe6e1d109b2541
font_02_sfnt_off00014fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB1 10784 bytes
SHA-256: bcb9172c3cd41e3ead20443132aa8519a6a0b360228897eab44820c1c644792f