Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2add0a593ca163…

MALICIOUS

PDF

76.3 KB Created: 2021-08-15 05:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4e25287deed485d5de31e66ad1b30a05 SHA-1: 807b4e788853e3b65ecfd2850c33ecb25757e682 SHA-256: 3f2add0a593ca163d1f65d447df0eb83cca59d1bef1fb47cba4bcc3029c9e275
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final destination or leverage existing infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/hhmcfqr0l1eje51j748c7d5lqp/bujixiruroxafumuxefoxejo.pdf In PDF document text
    • http://appartenvue.net/appart/upload/images/37983950610.pdfIn PDF document text
    • http://tele-video.ru/upload/files/38906395605.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cd7059a45---52905220870.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/5f1de4a951cd4aa343d7fd68e8a3b4ed/fogaxuzi.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/babuweduzepupajuku.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbe30b3e48---94937949122.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/gesunaduvitapud.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/nusijoxidi.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/959c8214f7a1d515bfa502325f73663b/13681553829.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/pb8j2926iiku3auk345dg8n7ck/mivegome.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/jogogaka.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075a5a00a22b---mazapopuxudokikam.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990e1ddac00---tefibumuk.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/50597982488.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8d2f1428---11070419377.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/78576644046.pdfIn PDF document text
    • http://renknh.com/ckupload/files/kiwetuguvifufisokaxifoti.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/80766241028.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd6509391---desatusinam.pdfIn PDF document text
    • https://plasy.com/uploads/file/fadigugavunowavo.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095536ee5d8a---16764232385.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/72856543327.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/jorunusilikepo.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/2bfcbdc77aa3db31af9cecabf5b517cc/75585969334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=tujhe+kitna+chahne+lage+hum+mp3+download+bestwapPDF 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_off0000c482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC482 16656 bytes
SHA-256: 4ae8150e4a5c40b4f1c15d0cfdcd489aaeb52e3030c41c27fbd5a5584426afc2
font_01_sfnt_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 11544 bytes
SHA-256: 378d5aa36d3936cd0a783364d53175507e78eeaecc35897453c36008af494114
font_02_sfnt_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1