Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2375cf50b3b6ae…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 04:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: eb3b1ac077837b6f0956d8bf1cf75802 SHA-1: f778ca5997d82d15031c0e064048e1ca03cf9b25 SHA-256: fc2375cf50b3b6ae27f9ef9e9261524d7274242780d1c54541c9156d700f42b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drlanda.hu/user/file/32768180616.pdf In PDF document text
    • https://kientrucqhouse.com/uploads/image/files/6678518184.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/51547131424.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/zuvuv.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d8144959d---59922345549.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/34523835549.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/66193562241.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/xudekufupotixobatuna.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/dopazemib.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/bizawajadorav.pdfIn PDF document text
    • http://lagrupacio.cat/file/megurug.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/3af5132b660ff2042bdf09e089413aae/zomoz.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/64800123505.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/59221737895.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/birelalivenewolinogofibob.pdfIn PDF document text
    • http://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/42656377162.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/soworafezupej.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/821872264.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160db6e37e6f22---33751134750.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/13858938352.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/77608949249.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5c1d8fdb95593bed590c4b131769b8f/zegixurovadinitul.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/tozuxalinubatujap.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/28035161590.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f5adbbad---gimisivowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=preschool+alphabet+writing+worksheetsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF29 17892 bytes
SHA-256: f90fb79d295f072bab487fa5870fb7fd3f6ad66d1f38656c3ffc2822b15f90d3
font_01_sfnt_off00010ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 10972 bytes
SHA-256: b0f47692ecffae85aa3ba486c43de953880ef2ebc1355fdbed0e1cc3268d63d0
font_02_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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