Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fd9ff2e7f83fa7…

MALICIOUS

PDF

93.9 KB Created: 2021-09-20 08:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9cc85c929a94d956ec981314dae7e1d3 SHA-1: f1b5ac45203cbeceb603e038278d80824e5b6109 SHA-256: e1fd9ff2e7f83fa7ac6b03e547d54f4d0399d1c19d9167a305cd9affefc49cd6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which are hosted on compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript is likely used to facilitate the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://reaga.net/js/ckfinder/userfiles/files/42845906986.pdf In PDF document text
    • http://eventologia.com/userfiles/files/49111054539.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/52395420579.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qgoj51uglv9jl7fo1i0d3uhcq1/nokasamikuzivoze.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/0i1cotctk83k13hhvskhk4v2d7/53259829726.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/43605912716.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/13767506090.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/68981368924.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/jomewijorumifujaku.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613aaaa1345b3---xozumedikewowugi.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/lafezimulazazozuz.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/xovojuf.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/bejarozikibamiwodatefare.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/50c487e564585c23773201c0c723c8ab/lodonurapifedumoxaralufaj.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613216111878e---kirajibirasogavi.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/78001677384.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cba23ca920---gafisutileviwumewifadu.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/35745048238.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/genafeser.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161324737b645e---19518140850.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/57431479990.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/96772836031.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/wemetakopizol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ghost+recon+future+soldier+2d+apkPDF 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_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 11068 bytes
SHA-256: 995b6a4fb0c953612098f616a8acac3fc86610cd1bfed449ab3b22fb5da2fdba
font_01_sfnt_off00012069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001387b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387B 18696 bytes
SHA-256: cbe23fc24e386ae40cb8ec0daab1b1730631c227a622b241a80776187485014f