Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc609a6997768955…

MALICIOUS

PDF

74.6 KB Created: 2021-09-05 10:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c1a4baa17037fd3639f79884f35c276c SHA-1: ee772da72efc7f14367e6850ec4a782d678c8f95 SHA-256: cc609a6997768955153930e04133f606909a33592f450f17a356bc7b64279718
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://coretry.ru/uplcv?utm_term=free+converter+pdf+to+excel+full+version PDF link annotation
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3c4bcace0b546075fafd424aecf79c57/zivojipodiludevomesax.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/26594766442.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/risifagaxusef.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021072216551589.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/73871cbca0506840659fa998e2ede320/gaxinotuseregadux.pdfIn PDF document text
    • http://ropesadventure.com/d/files/69795830263.pdfIn PDF document text
    • http://kalikraft.com/images/file/14330646380.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/18179661545.pdfIn PDF document text
    • http://teplospectr.ru/images/files/21226627040.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/b8b4e630f58b02348f8a1e3c812cd908/83961467040.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a60fb7a4b37---pufexudaxelebulasaxidadej.pdfIn PDF document text
    • http://usagimatur.com/files/others/58998706033.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/fagalituxetakapo.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/gikigazobowosofiba.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6449245643---jotalidedifexol.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/nidunekob.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/tolideputibisar.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/em447mfi83flg5bmcqdvpop0v8/kilukotidemizug.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/zaribaxav.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/35221202516.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/losuzedokovowezo.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/pojuziwimokojibevikopar.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kafuxasunotegogo.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/85074214206.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/8971423676.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

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_off0000c0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E8 10696 bytes
SHA-256: 478b4400318ab193d2c3c3c3bb8369e253eba93bdbef7532bd9650534f22cd18
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 16748 bytes
SHA-256: c74cb156afb7abb6d2555aee449857ab8334bee795f42cebc5397b60c8c8c452

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