Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32e2e1433ff1c5f…

MALICIOUS

PDF

230.2 KB Created: 2021-07-18 16:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fe2f2af3aad6c167552812ab82bd7c99 SHA-1: f32d13bf533b9ec26f78718336c493afbad84745 SHA-256: e32e2e1433ff1c5fba92297e6216ca59812d170c835b630b6b05237c20a7e800
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, indicating a pattern of hosting malicious content on seemingly legitimate but compromised sites. The primary attack vector appears to be users clicking on links within the PDF, leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

Heuristics 5

  • 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.
  • 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://kag.fr/userfiles/file/sixabebalotowaxewilud.pdf In PDF document text
    • http://joy05.com/_UploadFile/Images/file/guwanonadisekoweworaka.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ad1ed778---67888078705.pdfIn PDF document text
    • http://e-hematologica.com/users//file/72862346669.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/jnr9cjkpqka2agtp3bcf25l6n2/wiravinitanegibaxizabefew.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcc4ad6b63---29830806107.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/1972b7c9d1113f392850586247fd98da/6000138002.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/c9916b512865ea059772c99d5a491b2d/vawivuvifagasagadibe.pdfIn PDF document text
    • https://coatielectronica.com/files/12618692561.pdfIn PDF document text
    • http://veitali.com/upload/files/febarerir.pdfIn PDF document text
    • http://riph.pl/userfiles/file/japapobamubadawoxaj.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/zezutotiderebikubu.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/uj2f6unsluv35tln1fjbda61u0/70905226464.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3088884f2---40536955563.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb908080c---xatevulugasodipamubuwewas.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/41423936857.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/53318927589.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/54ae7a2c98e0d6ca393177bbb17c1fb5/64747997385.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/28909251963.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d76baf5d4---nuvifakojedaxobefo.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/n1sqb4faeokt1alsm14ck152hh/patewezukugutedemobop.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c8400b02---dagokon.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160715f4c08a94---kagijofevijifobimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=average+fundal+height+at+28+weeksPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/zunedan.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_off00032a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A7E 11164 bytes
SHA-256: 88e4db6419518e3fa0b700f3082cb45661851325d738dcb344dc94f94129f06c
font_01_sfnt_off0003447e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3447E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00035c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C90 17772 bytes
SHA-256: 6f2c517eb197d3610ee184e224e21fea61797c8ec9c39064251d230fd920eb94