Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe46449c5e9e96e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-02 05:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b197b2d3c8a86609dbbbe163fe4a530e SHA-1: 7c758b16e534db8d7399dba5e735f20d9fba5edf SHA-256: ffe46449c5e9e96e54d4397e4f44f171ab60ad66dc36bf89b8130671e4322fe5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. These links appear to be part of a link farm designed to trick users into downloading files, as indicated by the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ac377d60daff6b7af373fef9e3438155/notijusokapekudasepop.pdf
    • http://tuclubcr.com/campannas/file/mopabeg.pdf
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/49689924108.pdf
    • https://pianoinprimopianofestival.com/uploads/file/xirebugenit.pdf
    • http://ankurgroups.com/userfiles/file/73371222350.pdf
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210528013655176353vlvvpx.pdf
    • http://absolutelyneon.com/userfiles/file/47896181290.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/aed7b22afaf7542b00374c63f5255b81/luvojobulaxade.pdf
    • http://royalwedding.jp/images/blog//file/zugewoxerufovimelufape.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/1b140d252b7c2079cd643997c8ccf846/38420788704.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4ti50elfvjvj8gs6lvap5ivddd/soletigokobatajin.pdf
    • http://adabaskimerkezi.com/upload/file/44704587782.pdf
    • https://larustt.com/upload/ckfinder/files/97716057398.pdf
    • http://alisawedding.com/upload/users/files/rakefokuxelosuxodu.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c7acbe49009---3306463342.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nvjccghc6r6g4c878so2n2rlv4/tiloziwarekuzunig.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbda376592---17455752143.pdf
    • http://computer-rudolstadt.de/upload/file/55630192279.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/39b6d91de2a77a95d02e2dc7850bf40a/rufetijufenuxeroju.pdf
    • http://www.deco-interieure.com/userfiles/file/palel.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e7c068323---20624194412.pdf
    • http://aj-logistics.com/stock/userfiles/file/minut.pdf
    • https://simon-daulte.com/ckfinder/userfiles/files/18142781618.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c9ceb45c7---24467812402.pdf
    • http://kleiberit.ru/files/file/54073725574.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ben+10+movie+download+in+tamil+dubbed+hd
    • 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_off0000d426.bin
47397e0972aecaf47452014360d35995a54853f68c459b8ba0141010088d8bd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD426 10864 bytes
font_01_sfnt_off0000ed13.bin
2489975910c2e7281ab9ebea030a82363ebde2dfc4349f38c85c7536696a3638
pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 18196 bytes
font_02_sfnt_off00011c32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C32 16792 bytes