Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3a46033012d3dd…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 22:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12d1cf1a5f58d4031791f2bc15e08472 SHA-1: 38def78e996ff62332f762b2b979e56e2526c26a SHA-256: 5e3a46033012d3ddbae1d83447522cb2a1633de47e349bea1e44957085e8e24b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to distribute further malicious content or phish users. The presence of embedded links and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://yanartextil.com/firma/files/67225116107.pdf
    • https://baxsporthorses.com/userfiles/file/gunevutoj.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/81670058f306d29047e8ea12313c03a4/jonerajozov.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87c762ea3---12341717194.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f55ebe049d---28385841754.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/0fsnthmdmcu9bh7otll0fguto0/momubutolatabulogokisa.pdf
    • http://hc6999.com/userfiles/files/96650894329.pdf
    • https://europawindow.com/app/webroot/img/main_content/files/31038786879.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ulmjh0lfrk8tl2m09rh4v854ff/bisitipafinovepatuv.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c51056304---mezofikulidovutepo.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/ig8612deqdolui1s1ooh5f2r6b/zomulisibageni.pdf
    • https://jdlpartnerss.com/userfiles/file/gewirej.pdf
    • https://perfecthospitals.org/FCKeditor/file/kefawij.pdf
    • https://hagabb.ro/ckfinder/userfiles/files/dojapukebeve.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c422b485ea6---gimevoson.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bb069dd3744---50143290155.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0b22b9de8c7c576b7fb204cd26372fd6/92986984370.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/801kgfh1n1qq27r6523upj9q6v/pamufanexexebekuk.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dbb0359df---61776939302.pdf
    • http://mexvp.com/ckfinder/userfiles/files/78668432500.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/b3s90ap3purue97jegdk9nrce8/42658039321.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1f7067675---bisasovo.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//kurasagomapatesal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=barangay+clearance+format+pdf
    • 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_off0000dbab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAB 16792 bytes
font_01_sfnt_off0000f3bd.bin
ec653caabdffa9ac6212796754f5a129aa9f274bf230255b54e2d5a9ddae8cae
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 17616 bytes
font_02_sfnt_off00012118.bin
1475ebfef62dd7960f5740470910354e83d98af049d02d9803c6041949d82aa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12118 10868 bytes