Malicious PDF — malware analysis report

Static analysis result for SHA-256 d608eec009e04646…

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 09:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 50c0f2500401955e687ac9467d8b4beb SHA-1: 3e3a07e029805e765affe55586cd3851a1f6e708 SHA-256: d608eec009e04646d8d6548da8ddf88ac59e7197ac72da1ba6c8d937947eb654
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or redirection campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eda7f5575e---20103703142.pdf In PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160872797b287a---96570605026.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bedf29ba24---76177450107.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c63c62bcfd24a0b7b07d5de881bf4a70/82748589425.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608865e254faf---13820804117.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/60949619536.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/900c2e159637f23b1fd23b1e8d4c20fb/13905234127.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/10073544922.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/repusafixijujima.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607498a529880---watomubejijurafelutolexi.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11a70f1d3a---jenidefu.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/kizinomepabivaxorefo.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/fokopuxusevupizetuwanula.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/90971292307.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/59340055422.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/meveranupozew.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5c63e503f---62626411370.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/xugilijetadazopupegotelix.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/lewuna.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/58029771926.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d14e8f91---kagopazejonixadarasudiku.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/52354352351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=old+testament+culture+and+customs+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_off0000d6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E8 10812 bytes
SHA-256: c0bd03bf174c91b9fabf8bfefbfc1d4342891f8eef6911f4c1b110f9d2d003f5
font_01_sfnt_off0000efd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD1 18204 bytes
SHA-256: db32c41117f60b17327206c2588b6adbbc44b2c163ab6d532bbe0706e10d16ef
font_02_sfnt_off00011eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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