Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e372845beb52b0…

MALICIOUS

PDF

85.3 KB Created: 2021-09-17 05:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0def7a3aa22d634e6ea219cb9a9f12f3 SHA-1: 58a3dd1fdaec3c35d388437a199556b5a8523d63 SHA-256: 46e372845beb52b0f14d2aaec05745bafbbeb58cb613946110fdff4d3cb31134
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs, as suggested by the PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, which are often used in phishing campaigns or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://maychieuvinh.vn/upload/files/jobelujilanaleledabu.pdf In PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b1e613932---ligonixiwogapinaro.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/89872315047.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/90810007331.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/bojili.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/29882969491.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/jirezo.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/jizifodowoligujale.pdfIn PDF document text
    • https://abss.pt/userfiles/file/xamabizoxufon.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/63203134309.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/budejolokavikazewujufitow.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/wolefexo.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/43267619131.pdfIn PDF document text
    • http://dmkert.hu/files/file/guwoki.pdfIn PDF document text
    • http://fitviewer.de/files/file/90109556569.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/dufogo.pdfIn PDF document text
    • https://nhatthiengroup.com/files/uploaded/files/zeluzawirujuzokula.pdfIn PDF document text
    • http://villkasz.hu/editor_up/84141650599.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/57873718318.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16130052079b83---32217223780.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/duluvem.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/jawepozalopax.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/02/kepelovakokotezosavoga.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/2862440907.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=odi+powerplay+rulesPDF 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_off0000e91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 17976 bytes
SHA-256: 5cbadd1961e4a00d8602687714872ea31e470c1cb0296e12639c30b10b227583
font_01_sfnt_off000117bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD4 10508 bytes
SHA-256: 0236230c8377c9819abfbe920224d9802217a683c6d08bda7218480692973736

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