Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e29976a18152885…

MALICIOUS

PDF

73.0 KB Created: 2021-09-25 00:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 95aa47adea044c215d559d907d004224 SHA-1: d9540aab319368a717cb0ee12fef40025c8b56d0 SHA-256: 9e29976a181528850460732bbf86067fac81c92ffcbecfe3ebd06e4798f3b0f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these URLs and the overall structure indicate an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614773797d7d5---53121178378.pdf In PDF document text
    • http://moonlightmontessori.com/upload/files/jolum.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/zedir.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16141c935b121a---vibarati.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/392a441be085b0dafaf2c91cbc3251bb/7310788645.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/48969687588.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/besozotiremupubagejaxij.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/37309886604.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1614366e6c4283---nimofodezogoduvidifi.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/93832744548.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/pezalufigan.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/xarusoxanumejowuzamefiten.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/77655370217.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/zosag.pdfIn PDF document text
    • http://megalaserasia.com/upload///61955368825.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/vegolepividi.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/texadonelevamuxa.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/bizofedenu.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/toviforika.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/10738156511.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/31723800064.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161362ba62520e---28092331206.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0237b565bf7f673b2142ccb6a3353f31/27731650808.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=x+videostudio+video+editor+apk+download+22+o+clockPDF link annotation
    • 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_off0000b3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BB 10980 bytes
SHA-256: 47156cfac06c01ab947fb7e1a48dec10461569fcf8587b99f082461510ed1cca
font_01_sfnt_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 18124 bytes
SHA-256: 49517d3a09edac3ec787e27e46b1fe4af7713a9bc5ad8048d4c86403ab5384fa