Malicious PDF — malware analysis report

Static analysis result for SHA-256 054fccd89d3966e1…

MALICIOUS

PDF

76.5 KB Created: 2021-09-01 10:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 396fdaace4d9643fa574ec1ac3591140 SHA-1: 3b298eb3281e955f914a5889947ba22bb19b7843 SHA-256: 054fccd89d3966e1084cebb5b15ad2547d7ca5e8fc2b9860c51afe32019a9984
154 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The presence of multiple distinct hosts and a link farm structure further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8766

Heuristics 5

  • 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
  • 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://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/44tp6miejf3878nmqucse4ufr6/jemiloxopuxuta.pdf In PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/ntbr22tenr4q82kohfdsc5ud3j/dovevafutega.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/4c2fe247002e3a1a17aab30ff88f5751/sezerepuboniziriru.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/zuvup.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad9a0c6dde---32267488438.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609879060ba97---zexudivejofulavijok.pdfIn PDF document text
    • https://steammining.com/userfiles/file/lebonon.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/8tsup5drv44br6cim9g59hgto7/15288929876.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1cc3b4d7f---61558763699.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/61995352902.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/sizederovejugotaroga.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/a515caa9aa31a9d8edadf209650cf9bd/9490690836.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/rojafugenuwugute.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/93730627366.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/og5cujoqja2klvehb0ht19dgv0/36503074465.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/nolulisejifixujumer.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a6dd6485---18358495266.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210529110109.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160870f36a6ee9---79274422239.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/gusiwuzidumonomopoxafux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=east+south+west+north+mapPDF link annotation
    • 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_off0000d587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD587 10548 bytes
SHA-256: da117f82ef0faeddd7c9d11cbfab99833333ea5090ae99f2cdcd2e21a1eb8038
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 18308 bytes
SHA-256: f1e464052a531d463a717204642f937e8f34ede941b07ccc4e1cda80e8370629
font_02_sfnt_off00011cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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