Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d1bedbdbfd2117…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 04:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0159b21df96311efc593013468a1425e SHA-1: 4922f269f02b581bb0b1ecf4436011e62b342278 SHA-256: f7d1bedbdbfd21170db5b8689a91855de7118d2c8f29ec1f7863117818d9a130
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://martonaroniskola.net/userfiles/file/fekitojugirexifobudoxubem.pdf In PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/4755081979.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210505220317.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/71772900388.pdfIn PDF document text
    • http://rayanchem.com/d/files/34177897901.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/40392461662.pdfIn PDF document text
    • https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/zofosalizosa.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/53940235651.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/rewuxozejilagare.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/01421f56f77b50b157c2d3f45716cd8c/91075834171.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/bda15a9ec4d7efcf7952f49652da1919/zajupuxaxo.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/gakazinuromiwo.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/vapugapip.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/95730120520.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/fc250f204bfe96a5f8e96f254c76670f/45521795874.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16125f54341301---18012189373.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/30063960813.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f363d49dab12893fcaa199f7aa54277f/13374097335.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160766dac20ce6---vutalojamexikogapibebuwo.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e029ab0c9d---87289746878.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/90686423783.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/25413621532.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/84043764718.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5279a8ebe2---wusufopesozatazolopifev.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b8aa4ab3b1b915878642fa10c94e29d4/86473969134.pdfIn PDF document text
    • http://riversedgefm.com/files/file/ripuwavizifilarupati.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/0kc3m3l44sjgghgvibmivads12/vomikenilefokapajipol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=the+age+of+surveillance+capitalism+shoshana+zuboff+pdfPDF 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_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 16912 bytes
SHA-256: d2f076155abae9aa9a8e3d6d81c2d409d1e43359b2b31b0a8ae64323abf4c106
font_01_sfnt_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D9 11396 bytes
SHA-256: b51dae0a0710458d70b21c63afbd37602ddbc439b4eeabf09a01487dae0fd4cf

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