Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7753a001bc06e45…

MALICIOUS

PDF

73.3 KB Created: 2021-09-07 21:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 14494fa9f1c85979cc54f675553668c4 SHA-1: 581faa17d1012c6726be1edf738ed64bdcd361ca SHA-256: f7753a001bc06e45adf90349d3a888336bf089e3e2395fb7e2424b49e4c9cdb5
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm hosted on compromised WordPress sites and disposable domains. The embedded URLs suggest a phishing or SEO-based attack pattern. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially malicious external sites.

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://allytemp.ru/uplcv?utm_term=statistical+methods+freund+pdf PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc67497db---3326405578.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/e8789c220519465caf80a4c9e597ac17/70149438992.pdfIn PDF document text
    • http://4bx.pl/public/file/komuloresutewa.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/jeribirek.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fb2860553---15396047016.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f732854192---wudekatez.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210730_A9E01685550CAB3C.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/24144640286.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/17770631338.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1781c0e801fd8f1f5b9905991838a1de/fosamowamakofitadafe.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f8f66c120---99116204382.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/in7765kv0fnki7ji0umtplpm51/vifatunerawibefafeturogu.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/terunovosejapo.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/n3l1ir6krd515unc3rgil5ofcs/89836030780.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/18081579265.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/924d82901434b0133223cd4da21b5412/vesoxatosodame.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/4954579883.pdfIn PDF document text
    • https://tonitomov.com/picture/file/nawifulerojuneje.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/23478371526.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/53717d65386cdc87487ff0dba5579a8d/lorodewozedevezeve.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6baa997547---64261958672.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096268452431---70745530764.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/33421908820.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098970c61c41---36426439576.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_off0000bcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC1 16136 bytes
SHA-256: 4187f53ec90911b75c60c100500d4293837827283115c7dab1d31114425af331
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 11060 bytes
SHA-256: 81a79ad5ad0d78bac8025cc781476e6d2520e4cc50e7ebba395c1ad02d215a91

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