Malicious PDF — malware analysis report

Static analysis result for SHA-256 40da72727bb5afec…

MALICIOUS

PDF

85.4 KB Created: 2021-09-10 15:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b53f9f358eafb371418e14a721eb6385 SHA-1: b9b1db2c38d48703bacc0ba0cb8a243ca09d93e1 SHA-256: 40da72727bb5afec8e32349ea4b37fe5e895321f3938f3c61c7031c824a5456a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. The presence of embedded JavaScript points to potential exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=what+happens+when+you+factory+reset+your+android+phone PDF link annotation
    • http://wjcopy.com/upload/files/jazete.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/vavexoxive.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161329d7b9a1c7---penaponof.pdfIn PDF document text
    • http://93564497.com/userfiles/panir.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a509c5cdd8---30809558483.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/janizogivavun.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/29527846703.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/gugopufevivavunosuruvu.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/dajuvap.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/11062048960.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/8067314998.pdfIn PDF document text
    • https://anup.bo/images/files/10806211559.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/1313eff71a3b32e5727aaac59fa8e483/roxesib.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/wibowezupiruxam.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5d6c4ae6b---2338891853.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5824df9aaff0893ac77e2dd7d67d5887/xegugubowamorar.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/galosoturek.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210907_CF68FE02504CC529.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/litasefasivalewetuk.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/kadesodo.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/visozifotivebotusalimoj.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/gokozotowiburafukafusu.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/vegaramavekofud.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613a25a1a117c---mewazivo.pdfIn PDF document text
    • http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/91271724079.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_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 10964 bytes
SHA-256: 7e00d4fa66deefbf231b261c600ee13a66b28a5137812d56e489ab285d94cfa5
font_01_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11795 18156 bytes
SHA-256: 7d7d5751115532db731ecc7c6a212d9e53a988d6a20862d3b29774151dccc88a

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