Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c784a1a3dfe3594…

MALICIOUS

PDF

86.0 KB Created: 2021-09-16 18:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 41673ddbbd3499121265bedc4d019c99 SHA-1: 3d496ee5eafa56aa9f130b777dda00d61cfdda41 SHA-256: 6c784a1a3dfe3594d24bfdcada90e72b5968b9b1ec2f40172793861dad3a96a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a pattern of hosting malicious files on untrustworthy domains. The embedded JavaScript likely facilitates the redirection to these malicious sites, aiming to trick users into downloading further malware or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://media-get.com/userfiles/files/panuzeg.pdf In PDF document text
    • http://rapet.hu/files/2436850381.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/gagabe.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/bewurumosef.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/segug.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/jatetisomurakebe.pdfIn PDF document text
    • http://aurora-c.jp/files/files/xepotitatopejotixuxidasig.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/duvorekipekipifugame.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/nusiw.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/37915948534.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/50905466966.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142feee7e064---fojujoretexepod.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/83533082524.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/24797820790.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/98320119466.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/161398749ccf0c---zawozovozaxudaw.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/89621806710.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/61526423397.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/moxetenurunewusorujamar.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ea990cabe---93933792675.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/27005880402.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135320479320---xavumove.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613fa7dfcec34.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/wutimuwunofotowowizetigug.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/poxunasirokemipobilitak.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/vususojet.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/19157562213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+sync+outlook+with+android+phonePDF 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_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 10996 bytes
SHA-256: 80e4e62156a49275156c6268df2a0fd0411312caa3b5618d330c51a502256ec6
font_01_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C12 17620 bytes
SHA-256: 9625437d537486b20b792fcf80a3267a9b83e75638ee376d11f47e7abb0313f2

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