Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd75c9662033d92a…

MALICIOUS

PDF

89.1 KB Created: 2021-08-09 20:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5580f243f9cb2d874999f22591d01ba7 SHA-1: 95f85b5efe16ea995eba7841b444ac8323a34302 SHA-256: cd75c9662033d92a6de83d63e8a9077388bb317b413d17ac1427c5a70391dfc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://synerhu.ru/uplcv?utm_term=control+systems+engineering+7th PDF link annotation
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/nosenogefazafapidobix.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/lifik.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/rejewa.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/06-15-12-10-35-18.pdfIn PDF document text
    • https://aghs.in/ckfinder/userfiles/files/revijifone.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840cefb6286---54231759726.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/672f9f6da27f43fff51b45aabf93f7cc/77409710388.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/wuzodewinukopijopuradow.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814321a44e8---xunejewe.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/sisedanojozexosevori.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/detatenodugibo.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/7618373047.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/12631089979.pdfIn PDF document text
    • http://rc-modeller.se/images/file///jazawupimanurafevuwe.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fshknvsuqa6qmgp77g2i40kpot/pakeganixomatitigilirotu.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/vufazugovusomigekevo.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/47pa1e954bnj65mavvls7gm0pk/9028105554.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/turokumuji.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/selapakuwojetuzebesum.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/36368488478.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/0fd885cb5579ac8ff1ca6f3949def0d6/89632328029.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/buo1me4abcc7p9vihde78uc1qt/34774592056.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/68604131213.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/xipodofefono.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8c7571c8d4---67513110538.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_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 10588 bytes
SHA-256: 0357d2299df6844aff01f97b6e9aee5d0d9381712d859f8d2f23b8e979d16d06
font_01_sfnt_off000111f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A04 16880 bytes
SHA-256: 1eb00e05031e05404fccdb29d941824ef5f99b03a8d576c8a77037ec09f1d2ac

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