Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd0ad423b6f5c9b…

MALICIOUS

PDF

80.5 KB Created: 2021-09-09 14:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cfcf59a6f9786a468197c9fb4bf68a13 SHA-1: 6a9247ae3b8918cc9cd95785579c0600cb9df9c8 SHA-256: bdd0ad423b6f5c9b53cae9b090574e415acc7050342f8db941daccbf637cebf7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The presence of JavaScript suggests an attempt to exploit PDF vulnerabilities or initiate further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://hmondo.com/userData/board/file/lijivi.pdf In PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/18745549573.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/503893325.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612f61a509b9c---kotovuwokiwoxejimu.pdfPDF link annotation
    • http://phuclocvienjsc.com/uploads/image/files/nawetokome.pdfIn PDF document text
    • http://thaymanhinhlaptop.com/userfiles/file/80535308902.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/jadodurunijuvivisi.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/nuxudupijerimila.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/wasazinorututupovor.pdfIn PDF document text
    • http://ipublicity.cz/data/file/puxidarenufutebilus.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/19805343251.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2cb0e6220---tokazebarifolijidokivo.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/74692571496.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/11277645810.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/lufomogezozedesivuk.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/dubilejetunepiwazenimigu.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/gonitixonafupetofuden.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/67d311458db9a230e093dec14ef29a6d/pazulel.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/viboxumamulorib.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4793409b8351fa656100b7d688646d8a/98863338289.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/7034052023.pdfIn PDF document text
    • http://zerosquareonline.com/file/82916523924.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/gd7l9a3f93a9ff5gihh6o5j1h5/mofiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=hsmtmts+season+1+episode+1+watch+online+freePDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/vaxapejuxef.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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 18024 bytes
SHA-256: c25a15268a93486e59b9a92de2ad407a1ec69ed91028cf04eda6e7fe21f9fdb5
font_02_sfnt_off00011b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B10 11016 bytes
SHA-256: 46fbb873e3a8b313e7541ff2606dfef033599768f37083bd1a5ec5cf7e5d5f7c

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