Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce78b88eb8ffb207…

MALICIOUS

PDF

89.6 KB Created: 2021-08-10 07:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a55f77042650e5ff811c45d3b1abe11f SHA-1: 96f1c87de511e03ada68cde9a4562048d9a53b75 SHA-256: ce78b88eb8ffb207cfee64f20a4edc78119e1d1293fbbffcf19cac44441b642e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF structure and link farm characteristics are consistent with common phishing and malware distribution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b25957dbc70---pelifumediza.pdf In PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/sunhoc7kfppcaccml9hiitmpqo/fovinitunabi.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/foboramofanebog.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/kazulaletemixivegaw.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a992e01d065---tujokuluxovapunit.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/75840206236.pdfIn PDF document text
    • https://datawire.gr/files/files/44677365560.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/diviluvarawebi.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c16ab66ee21---30599985410.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/vedidasusegaxadefepuxetef.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ce152b7bb63582bbbfe993cdb9f0172d/gibupo.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/fosipap.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a509e9089---72821899570.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/42923804444.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a147f0a6fd4---33666112648.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/bc2e8a24da483e72955b7db9300153f0/10700192176.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/8veopfhiorel94fu5f122tp6ft/1277822920.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/tewutavasodujojoxigako.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bf758b6ed---goxomokanixe.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/77234798952.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a518b275a64---63705026907.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/dunexixijijop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=apple+watch+ecg+vs+kardia+mobilePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 11220 bytes
SHA-256: a2293982add0e55c96e2f8c4595b5dc977a348b2e010376255da6eba2bd2c25d
font_01_sfnt_off00011402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11402 16788 bytes
SHA-256: dc69c3878d856423b97a7ca42e8b150b830df14d0df32b3f98bc9e374fa3b6ab
font_02_sfnt_off00013f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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