Malicious PDF — malware analysis report

Static analysis result for SHA-256 554ad11f9c725df3…

MALICIOUS

PDF

76.4 KB Created: 2021-09-13 19:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a5545f8c1e4e4afdc9278e45a49ff49d SHA-1: 237e61e58b088a2eef1b085d55b3c8e0a94a71e7 SHA-256: 554ad11f9c725df3d444a1ad3ac2b5305c90d269df0666ce7d82a9d73a083d4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://garglob.ru/uplcv?utm_term=four+corners+2b+workbook+pdf PDF link annotation
    • http://change4best.ru/upload/file/6660003595.pdfIn PDF document text
    • http://hydrem.ru/images/file/nafaluwix.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/19294532028.pdfIn PDF document text
    • http://ty-int.com/files/files/wezenunofiwomijasisik.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161338e282dd2a---89046916657.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/fipizalisapawotup.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/5n90a9j2drfotvgd597n7ee3du/biluwuwuvitetapubimix.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/jasuwakeweweju.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/duvosagijinikejipexibere.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341986777ec---lutelesasavorosekuz.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/nipuwogumikamurutoxad.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/pelofosuzanojudemo.pdfIn PDF document text
    • http://mdtrend.hu/files/file/93705621847.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16131082881523---sisixanela.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/tuvavekigegajobulup.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/gogapotesarorofapejola.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/85233905925.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/92851733415.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0c2fb99e0722ba9b4e250dd8031e2bb4/13436178976.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/gupigitunomu.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/67632282112.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/80567327967.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/90513437226.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/kadagosirutevibulak.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/nikidibenelogowavuwuz.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/gejolubeluvupito.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_off0000c100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC100 10728 bytes
SHA-256: 7abd7ce7554c96f416078106662d13a8a4605495e162ddbfcd9dd4ec6a2e4d8c
font_01_sfnt_off0000d9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 18564 bytes
SHA-256: 2005ae984fca33a98708e5eda5a86f22aec94243ca1c0c844a43bd8030d23d09

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