Malicious PDF — malware analysis report

Static analysis result for SHA-256 554fbd27048fced2…

MALICIOUS

PDF

93.1 KB Created: 2021-08-24 00:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ce89e2aeb3433a6f6b0933792eff0f2 SHA-1: 855c0d6d26943f37e9b133e7f03b5996d64d3623 SHA-256: 554fbd27048fced25f182e41a0f7e8bd4001d41e1adffee2518067aae327d255
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing or malicious link distribution scheme. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to obscure the ultimate destination or leverage compromised infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://rosewoodcity.org/nbloom/fckuploads/file/gudelojegufutex.pdf In PDF document text
    • http://unewstoday.com/task/userimages/file/gatuwapisijutijud.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/wutorodufuwojada.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/gius68dsbiv7dg0fogtctl51e1/97060927875.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/mqomcrj2utm4378gfvvng8thlt/84753843922.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/17fe72e48c17c5553a4a08876dc13663/79199906598.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/webeberegusopisumagoremef.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d7d0e1364fef2cd761ab714a5eafaa47/90496991272.pdfIn PDF document text
    • https://computerzone.pk/file/16139456462.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210615_CA17E419DD5D737D.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/71751020776.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/53a62682cb2046a3c8432c7f8ef3c4c8/53500868777.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/moj0m3jis1nha9r14pp41hjbtg/15977777209.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161129755695c8---duvupawepe.pdfIn PDF document text
    • http://calhi1974.com/clients/46234/File/59586886370.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/rivajilaz.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160742c9d1575b---xenivu.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da3eb5ac125---sogetitinefuto.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/j9hqsdr3eaibhi6i526t195go0/befunut.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/begiwupefofa.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/kuparebusenabazilevup.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//xotulonuferotolo.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/jatipazanopalegafifazu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0al85dd2j7v4c13vojaqk4ufi7/wimetexux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=divine+right+in+a+sentencePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 2508 bytes
SHA-256: 7c0f49cfb2a6270043dcd2e209bda0651a50a4dd14fc3b7d35c063ccbae60b8f
font_01_sfnt_off0000e68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68F 21348 bytes
SHA-256: 0affca17440aa346e2e0a224448dff6970c7fe2de55032bd684cffd16ebfc9a0
font_02_sfnt_off00011cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 16916 bytes
SHA-256: c8ddea13f3055d8089839c5c17fd14c2c14516fb075f232faf18b4e470283bb0
font_03_sfnt_off0001357b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357B 10412 bytes
SHA-256: 669326cd4aefc98068ff51f38c48b2f519c95dbd8ade1e70911daf22401b2dea
font_04_sfnt_off00014d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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