Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9e3314ce469da9…

MALICIOUS

PDF

76.7 KB Created: 2021-08-24 14:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1390be7df390171c570b8bae451aa19a SHA-1: e65ea09288d15ef7ecce43a77021bd33f444c167 SHA-256: cd9e3314ce469da93425aeb7294c81301d5cf5b5b7ae8d2914d3c30d6714bdad
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/bd9b6d3f62a62ecb0b02b1b1648d3fa4/ratebopenekanuwa.pdf In PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/fawogepal.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/548761e790bea7c7e9abff4f0642677e/fijukodu.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/laxagijezasirobanogize.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/3608187339.pdfIn PDF document text
    • http://debden.org/userfiles/file/saluxan.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/jamuzulijefumegararatom.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750602267a2---28784454891.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/40da0s50e2sr1b36nut730o96f/jepinovemizinakanozonajix.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/webunalirex.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/1838aa4601cf99b00026500c6a9dc033/fizowof.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f7775eebde---99294076953.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/92392774798.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/58ee38373a2705b4ec013125f4ee2002/9002795337.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-6/20210506225339752064.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/31070668931.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/78640736512.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07f900aa15---56856095130.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/zigesatibazilirazane.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/77598541176.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/linux.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/seruwuwefiwugibukex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=meaning+of+ham+fistedPDF 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_off0000c423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC423 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3A 10648 bytes
SHA-256: c42b4478ff894910706d7e4dce1f461a088705867076d5ec01d56880e373ab9a
font_02_sfnt_off0000f433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF433 18936 bytes
SHA-256: f8bf745184e135b3b2dd03b672a383224cb61d2dd47cd99fb8dfcfe6d51152d0

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