Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a20a0c3906120e…

MALICIOUS

PDF

96.6 KB Created: 2021-07-02 03:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: db18d8be0a69a0f464bb6b8baa758d0c SHA-1: 95cbd7f217d378e2def896f4c9635050c31bc7d3 SHA-256: f1a20a0c3906120e4a04bef16628ed7643cb52fe493944a7d46417d141de63f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites hosting further malicious PDFs. This indicates a phishing or malware distribution campaign where the initial PDF serves as a lure to redirect users to malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f163d526f541f5466bf682651c8fb6f8/gudazisitorafidakaso.pdf In PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098929ac3d8b---sosokurukeri.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/7936709881.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/gufafofemilolededusu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9860388c4d900d0545906f4a74689e04/jijinakixosuwija.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/jibesuzazurasetoxonalaf.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/guzoxigasefudasomure.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/83909994609.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085b4e91fbd7---geterufeviko.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/37087694185.pdfIn PDF document text
    • http://cuacuondaiphuc.com/upload/files/padon.pdfIn PDF document text
    • http://valeneighbors.com/userimages/80334922753.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade1c9e14f---91181910069.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/lalezejaf.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/pazasufumurowe.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/xibevoxuxezimibarelup.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/iiep7b682eepqq280vgmhssgbs/31642219081.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/zatigig.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/nakuzagoku.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c3f866b2d---kewejasowo.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/mifogotokozaduvodi.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/jr3llbdqgcmr098vfllt3qv8kf/51912738455.pdfIn PDF document text
    • http://aplus.to/userfiles/file/bizoxivesaxubunamarux.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/e5547897fd6598df8235334202a3d9cb/rufekujadusep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hello+neighbour+download+iosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 10744 bytes
SHA-256: 29986e36e25a34de70bd2af2b0c4e26baf9de3aba972ac13c036f89f1b71c632
font_02_sfnt_off00013224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13224 16320 bytes
SHA-256: 8736d0bf9fed8717f3063841d296c0dbe9cc9c325752a279942ac8ad60256279
font_03_sfnt_off00014833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14833 17104 bytes
SHA-256: 6b809d78e1148058c7f67959275a1c46291ec401f971b600bf80d3cae37a9d31

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