Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d665dc098d7f99a…

MALICIOUS

PDF

84.0 KB Created: 2021-09-05 03:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ae6f468e4ed25a756a4694cdf85b87c2 SHA-1: 20aead88b0cf0fd9eebe1ed5a84d851d7e6aff2f SHA-256: 2d665dc098d7f99a0f57bbc1239f72fa04e51e25c4ec522be048cefefa29b899
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e5ce13d29ff70b2783dfbd715b3aff6e/65754208733.pdf In PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa63df0a262---jixobarovu.pdfIn PDF document text
    • https://noddy.nu/images/file/pepubitarapi.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210814125419189.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/nimeruxodiwoda.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c002e854417---87561781807.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/ponamodafozigakuwef.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/37277738665.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/46efd54cd841419c12f8863319f3c530/wosijubetibipapelexavufe.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/46330830492.pdfIn PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/liforefanobora.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/37477180971.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/80249740673.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78b26d2764---49681831314.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/sefoloxijeke.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/gogewurolu.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rnhqtbfti4qkf17e7mlkaeoubd/68045037849.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161037aa645cf3---mixifonapolesepasan.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/43020748699.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/2sb6ui4tku151l33d3i08adr7s/52911655181.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/03da2a165f3b3e117cfaa20def7dc4d0/wonobela.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074c762acb27---bumop.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6e3d78b84---54190947585.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/18027173811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=reserva+natural+definicion+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_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 19132 bytes
SHA-256: 40e11fbbdeb5592bc8d518eeb54defa75a8166eac5542a5c3156ca27cc9006e5
font_01_sfnt_off000110e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E9 10824 bytes
SHA-256: f61b9ddd19edcdbe74246e03e97b452ad794749c74c5638c89b5e2809cbb5b1a
font_02_sfnt_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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