Malicious PDF — malware analysis report

Static analysis result for SHA-256 2596db555cd2df69…

MALICIOUS

PDF

75.6 KB Created: 2021-08-30 04:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e5f3bbe6c3efccbaaec0fb1793092de5 SHA-1: 175b122c15b4eb2dd823b765e453f211ade19b78 SHA-256: 2596db555cd2df6970b4b5c4d9cbf31c49892c7f8719a06690dfdade1a5ce53c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • 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://huntic.ru/uplcv?utm_term=manual+restore+ipod+touch PDF link annotation
    • https://wsbtitan.com/images/file/20985273318.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/viginawugiwu.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f74d57991f---46963789071.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/47886456205.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/ledolaxipowijedezatatara.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb2961c63a---rafikusone.pdfIn PDF document text
    • http://m2m2design.com/userfiles/34231331707.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/22b2bb327158c707e0848ede3bd829cd/24954959584.pdfIn PDF document text
    • https://123natura.com/stockages/files/bakigudanafev.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/dixorisimuxuxusexuwi.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2d1feacd0---buzuxabuduzijibelolakar.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb5ffc1539---losimunumusatanigovoziput.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/tngu0ogphenfv27gh635qk8lr4/3997391299.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/77453491847.pdfIn PDF document text
    • http://unityproductions.com/upload/files/bififesixumulatexosepese.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/bemen.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/sedularaza.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988d9d76eb7---19510993881.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e644844b752---74540448226.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160bffe6f6a4ff---simavafaxipaxotaluke.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce6a548fad---59445018366.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/98242115331.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/91314218076.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb530dde5af---153806686.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_off0000c445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5C 10704 bytes
SHA-256: 3206bcc50e0f742fded70248b5dfdb8cb73ce3b14c6fa9da0b5146c31ee39dd1
font_02_sfnt_off0000f4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D1 16752 bytes
SHA-256: 32d8f8608344efa2a2567f3fa1adc954be2ccbc6273d3df4eb2ca03006464268

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