Malicious PDF — malware analysis report

Static analysis result for SHA-256 954976968b204bc6…

MALICIOUS

PDF

82.0 KB Created: 2021-08-15 01:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 831abf79418623fc9f2251a278ededb3 SHA-1: 6f780c27d9e625c1c0fa3bfca1b6c989308e430e SHA-256: 954976968b204bc657401362531f04650a48adf619230b606dfea5d7dbb35524
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=how+to+replace+pentair+salt+cell PDF link annotation
    • http://trunglamdecor.com/uploads/userfiles/file/rofixepipakow.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/nojoji.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/40431487554.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/91e6c6639343957d1fa3b9d951d5de87/rupewebe.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/6885318746.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/27285079740.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/kezoput.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160afb212a22bd---64327045118.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/j4f9p4u1k5v2v10652g6n1ah90/bawer.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ae52f56acc48cb43ae06781283d9f0ab/21964493668.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca482d15a9b---pavareju.pdfIn PDF document text
    • https://x-software.cz/data/file/rakabokedenasa.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/a3ngqdvem0bmth7rl0nmhjtnmt/47775698307.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/69865893426.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/jugubejinomerapot.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/89808039095.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aafd39ed4a6---41703624308.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/a39d42093cfc67df27bccfdaf04807a2/16740068068.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/xakaroter.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a6a5cbaf7451fed0edfb5f828b688d3/62255219259.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/33226025914.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/n1sq7uns7br2vbv0tnhsfdrd2r/rodogukidexejaxi.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d94e2be5211---fefolutelijefiwite.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/66972372603.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/pagiwugigem.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_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 16400 bytes
SHA-256: 302f4aa000840e5b63bdcc40c12ab85ea0076c6d1df2990840f6419a5932248a
font_01_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 10444 bytes
SHA-256: 3272a4fbd078aff6eaad588e34608fd0c5d0cf92ee1dbe3075a730c42afee3fd
font_02_sfnt_off000121cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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