Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76295343fb193d3…

MALICIOUS

PDF

82.8 KB Created: 2021-09-13 18:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e055f496254c57f5261981a5575f2b68 SHA-1: e234dad5e6d4423a43ab193ea6012569684cac56 SHA-256: c76295343fb193d3a18a6bb0413ac1441541a5bf7432bc3cf8a5e97d10592c32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/7e578afdbff187c92d45e0e02aa52c0e/xogaxuferufukagotolaputu.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161379d9584971---patoguzewipenuguwavev.pdf
    • http://esejsc.com/upload/files/xelisopamuzipumekifatulod.pdf
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/58871399593.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb1676636d1a26bc482b7e22cfc446a7/zurimuwugogemoxe.pdf
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/vemidan.pdf
    • https://eminentland.com/admin/userfiles/files/25084083874.pdf
    • https://artistprasanna.com/userfiles/file/wovararezilevuxew.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qmblgbbjodmkjpaitn9u0annh0/biziwifelizesovediwir.pdf
    • http://cdn.eagle.mn/uploads/userfiles/files/6222797003.pdf
    • https://korzo-galeria.hu/files/file/98238872488.pdf
    • http://primeasset.hu/fileok/file/13274142409.pdf
    • http://7166867.ru/ckfinder/userfiles/files/rikiwoginutasixe.pdf
    • http://maility.pl/_ADRESuserfiles/file/35316541603.pdf
    • https://evrenmentese.com/upload/ckfinder/files/38005277150.pdf
    • http://secondhandgraphics.com/usrfiles/file/belobaxebomelimez.pdf
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/26818051901.pdf
    • http://zamdq.com/filespath/files/20210913153844.pdf
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/71015691585.pdf
    • http://abwlanham.com/uploads/files/fufudubevolusupamip.pdf
    • http://extintoresorigen.com/images/editor/67409550415.pdf
    • http://allprintusa.com/admin/images/file/44954442524.pdf
    • http://akinmedical.com/uploads/file/vofuziz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=apps+for+mod
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 16792 bytes
font_01_sfnt_off0000f807.bin
4895581b7959e58ac6c5b634db930aab1f2c587f677b3cb0ac1165d2631baa70
pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 18632 bytes
font_02_sfnt_off0001280e.bin
b645e2a86461413120be2ea35fe546975d2f13143a88b2c08703a4f603f6acc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1280E 10008 bytes