Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98f0c680085b7e5…

MALICIOUS

PDF

69.3 KB Created: 2021-09-19 21:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 488da0a0f9ef16879e9ad7f5e06957d8 SHA-1: 75556fe8d784294935fdc4266b35f9969f37e876 SHA-256: e98f0c680085b7e5601eba4ff8932f2c8a956b8505faaca047db0651a322d6b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The presence of a link farm pointing to multiple distinct hosts, including compromised CMS uploads and disposable hosting, further supports a phishing or malware distribution scheme. The embedded URLs suggest an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=dlna+download+android PDF link annotation
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/b91ba3126a47f590b095d94308a362f2/72855477840.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/foxatetakudi.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/gonidoro.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16136f37fe34c9---26326585347.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/77390484695.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/58758273341.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/45310223373.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/27055132146.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/80145709684.pdfIn PDF document text
    • http://baove24h.org/upload/files/89219561312.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/nanikerugilop.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/2456868611.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459b69c412c---xojonasasaj.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/lamoxekewenulew.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/zebenigezosisapaziwak.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/bedimikavedekifinovenaf.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/butaj.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/11604054988.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/22140512942.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/e23q6spngeii6ulvn95v710rg3/musunuzas.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/nodovarejozumaxorew.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/570535990.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/keboxinizexotuzelipu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133953c1cedf---pomogefa.pdfIn PDF document text
    • http://www.puhito.hu/uploads/75330317881.pdfIn PDF document text
    • http://www.bash.cl/media/file/24298753751.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_off0000b59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 9928 bytes
SHA-256: 3ac780732594d25038a7cf49dc014c8f812e01c95998ac9cd0882de74f7c50a1
font_01_sfnt_off0000cb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 14252 bytes
SHA-256: ae0fd4fbd4c7e62b81c8dd0dc1dd1283bd9336858b24beebdc3b5ae45b4022c9

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