Malicious PDF — malware analysis report

Static analysis result for SHA-256 30af332934136460…

MALICIOUS

PDF

81.0 KB Created: 2021-09-19 05:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c837458ab9ba393b8d77e6e86c0ee796 SHA-1: a7055780e91a3225481a0fc80d83d93cf27a27c2 SHA-256: 30af332934136460d7425db9f0be0ab3344883ebda84fcb9569b1f43c5850f4a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains a link farm pointing to multiple PDF files hosted on disposable domains, likely intended to obscure the true malicious destination. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document aims to trick users into downloading a password-protected archive, a common tactic to evade gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb19ee9b3---vibewowev.pdf In PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/1395213546.pdfIn PDF document text
    • https://protum.se/file/97120599267.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/98890877424.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/75937774163.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109170652492050.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/49409407927.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/30898073682.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/xazuwuvamedafejifalu.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/77217633331.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/rosiporipajedip.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/fezapuvevejasetabav.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/11900354883.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/3846114684.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614680923b86f---15185905992.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/ronagaruwuxobagasakujuvez.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/73629418350.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/redilorezikuduzetaxeb.pdfIn PDF document text
    • http://mextro.de/upload/files/84904068743.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142f18758334---juziwofum.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/jofat.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/sukimagedefovinokesaka.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/1379753196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+open+tgz+file+in+androidPDF 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_off0000d4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F1 18688 bytes
SHA-256: cbad784ef7a751cde76de77ce12a49fd46a67e57dafdcb56b953c0664b56492b
font_01_sfnt_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 10640 bytes
SHA-256: 8f2e5f500c95824ad1bc534ebd828250a29918b346f2b797619e5999b813fa20
font_02_sfnt_off00011e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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