Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f0977dbc4e2b2a…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 00:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f509268b00e86354ac3bf17139b26b7a SHA-1: 2a449909c2c6f6bbcb1025e6655723dca0237e80 SHA-256: 60f0977dbc4e2b2af1a4f54a590bd7420c9259f379bc44b9e2ef0f14391b2a6d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing campaign. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, likely intended to trick users into downloading a password-protected archive. The presence of embedded URLs and the overall structure suggest an attempt to deliver a secondary payload, possibly via JavaScript, after the user bypasses the password protection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 https://pixomot.ru/uplcv?utm_term=android+turn+off+pin+unlock PDF link annotation
    • https://ajitcoatings.com/uploads/64977273859.pdfIn PDF document text
    • http://ijfbn.com/editor_up/65539425684.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/32802591306.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/11669667969.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/bupatojapubipifizewinob.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609270a3ed321---63972712944.pdfIn PDF document text
    • https://advik.net/userfiles/file/ribozalatevusij.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/8e6469785b500b12417cc57a6e667d90/kufefavobilunisosunenasop.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/fewinagilu.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/muwarin.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/22341127328.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/muwuxad.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021051000200373499.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/jopud.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/11184938586.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/71858798630.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080d2b136f81---83295860267.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65f0d2a69---39461984722.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/12804005060.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/lfjce2vark6umjt9ikvioprf9i/gopinofevadewademo.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/9btd9rt49175vv6ga2l7j0clr3/67231362182.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/bitikanetalubokewuledi.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/5e1aa09f0f0f918442fc7f10d248f93c/57261390259.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/3it3e8lk5l9ult1b04hk0983oa/dipomulagisuk.pdfIn PDF document text
    • https://tuttoadomiciliocn.it/file/21341459921.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/5c659ab0c13aeb3639b239512a53c3cd/19952472624.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/46182216453.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_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 10324 bytes
SHA-256: 830f2d492fcc7f80d308a3d545855ab66c7d66536b370e5b86a00bd35953b784
font_02_sfnt_off00011137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 17756 bytes
SHA-256: 58ecdc414d33ff5c6d5349ddebdd19be58bd2d4dcead2440fbec560e9c382559

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