Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04c702c9ea38753…

MALICIOUS

PDF

72.9 KB Created: 2021-10-01 13:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 0aa60c2f0733150633fd95e8addb847a SHA-1: 3d947e1a8003fd1b73a1af7d2c2b669e55059c13 SHA-256: e04c702c9ea387537a5e9d65bc52ca67ba09490b720c97dac014caea1fce72ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains embedded JavaScript, suggesting an attempt to execute malicious code or redirect the user. The numerous external URLs, many hosted on compromised or disposable domains, indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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 http://dobre-jaja.com/Upload/file/gumonujaki.pdf In PDF document text
    • http://innova-perila.ru/upload/files/wegofikolokuxopejejit.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/zitupelivilidexigukizuran.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c694de23b---genubudewigelalokura.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/vosotofibuxaru.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/lixanopalufer.pdfIn PDF document text
    • http://gibisch.info/files/files/vajuruwibofotu.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202109280317296615.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/81473796701.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138c6d8df1ff---92134625068.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/vopimegobakin.pdfIn PDF document text
    • https://hoongnau.com/upload/files/86608278113.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/powotixur.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3d83e830651e61ae3311c49be6bde998/dimasefarovibi.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/mulajowexoseseduduwavilu.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210927210433556401anla18.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1633066441.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/jafamijugudubetura.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161379950d65ce---mikezusose.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-28/20210928040100267318.pdfIn PDF document text
    • http://dvarenda.ru/upload/file/gemufewiforoxigikud.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/rajunowoluvu.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/46581076551.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144be0469d92---jolagedakodaduwafoxakofuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=surface+pro+6+vs+7+specsPDF 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_off0000b581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB581 10592 bytes
SHA-256: f9596bb079287be1ed3949bda6df5157d37655297b272d80e557e29c56404b60
font_01_sfnt_off0000cde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE1 18908 bytes
SHA-256: fd8769d9d667c592802ab7d583fb3c4773f4363a5cdb0c4f89be13e229faef06
font_02_sfnt_off0000fdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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