Malicious PDF — malware analysis report

Static analysis result for SHA-256 832605aae18ae3e6…

MALICIOUS

PDF

118.1 KB Created: 2021-09-05 02:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b02fa14cc455dddc84716a9345c01012 SHA-1: 1bea98d55daaa1e170a4e2cb22759108e97a9669 SHA-256: 832605aae18ae3e60978349a680c836cf0a1c47fedea17eab0003a6f085dc505
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. Although no scripts were explicitly extracted, the nature of the heuristics and the URL patterns suggest the PDF is designed to redirect users to 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 http://medtravel.lv/images/hand_uploaded/files/diverizazejum.pdf In PDF document text
    • http://x-site.by/upload/editor/files/zakumu.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021080803381114.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f72032a86---51100749612.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a33bupgap634mokougn5chvrm/detupogulifizi.pdfIn PDF document text
    • http://beauty214.com/uploads//files/202108111836092276.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074bbd2a620f---woramoka.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/81fcd200e6f3f0c8da9f89d132f73ced/xujeresavajod.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/vonufija.pdfIn PDF document text
    • http://apple888.vn/luutru/files/kikapudur.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/230bc0f479f4f07f20f0279bb8181a03/83625598273.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/ae7db158838ab7430b0a9267c7f64d59/13657136982.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073b0d970b61---xixerebedomisikotufepiwul.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/96f40246052057d9394745e1f4fa1109/77827369060.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/28378090560.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/luzekupaxir.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/v6cati50uf56u1n3ndg2vajc1q/zubidajinikusil.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/35999238447.pdfIn PDF document text
    • http://okun.su/upload/file/22880686223.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f459ede383f---76752355706.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=honda+crv+2019+instruction+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16791 11020 bytes
SHA-256: d45a9c678f2a9aed08c2b3a2437182fb17461bcbdb7f1cb3fb9e9adc3365c3cb
font_01_sfnt_off0001813d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1813D 19128 bytes
SHA-256: ed156d8d0adb827f3ce2a890ce97299f5cb1687b4c9c6ae9b3fbde82a70604b5
font_02_sfnt_off0001b2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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