Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cd3996631f6f89…

MALICIOUS

PDF

73.4 KB Created: 2021-08-27 23:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b1ba035ac9d67a994ec3d128084820e5 SHA-1: 4143371060c85f7e37b182ba0e9f2615201dd89c SHA-256: 98cd3996631f6f89bd7f3d2c67d2b23df1ed9a7b7fe322b8e6d75084fb6884c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or phishing pages. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://wastran.ru/uplcv?utm_term=live+in+property+caretaker+agreement PDF link annotation
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/81e02d6bf6ace20b06c2e4595a701a05/21323852022.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bba1d9521a0---12104246285.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/mogadegepuru.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/39044243641.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b6944b030d---97310429661.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/96497118357.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/bigekoviwomujijinuwir.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a385484f96---zovadezowijoli.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/55508144349.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/sinepokujunasumovejiwirel.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/lixegimipujoxukavakupadub.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/0bf806c1a5b21531d1a5cda13999dd6b/81181485715.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/woguzideg.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/daxonozuzewos.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/n0775vvctj0g35bq4pnmtil2ck/57356401656.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/36487469092.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/wigur.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/56458064792.pdfIn PDF document text
    • http://z500.si/files/resiwurapulavobolajubujep.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/19073235207.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/3046973466.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/53552230855.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/47571136770.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_off0000bca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA8 10732 bytes
SHA-256: 5a57f23c1d4690a678256df8ed795a5db498856087a483a06d5c6a64e9fade27
font_01_sfnt_off0000d55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55B 16056 bytes
SHA-256: 653747445296004c58919da7eeb5eb0caa6113adfd7856be8a2aa7d30aae28c3
font_02_sfnt_off0000fe2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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