Malicious PDF — malware analysis report

Static analysis result for SHA-256 1230d2cf30f1af21…

MALICIOUS

PDF

92.5 KB Created: 2021-09-08 03:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 93d475a3eb3e90877eb85f5482519e1a SHA-1: 8c5edc18b4581e81e98438c389ac4e97e3c0534f SHA-256: 1230d2cf30f1af2155c88209a2bb2eee1b893d7cbc03746424282b1a311cd8e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a link farm that points to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The presence of JavaScript indicates a potential for further malicious actions, such as downloading and executing additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9efe29f3b---jumosixupezezitiwig.pdf In PDF document text
    • https://bonacorsi.it/file/58519196808.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c95ccd163---vapajaputitonib.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b38d79161---41030734321.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b1a936e1f---78615689441.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/28198355110.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/zivaxawubaxaj.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/32049802035.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/33735842850.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a569efdc1b3---xigekodejudovebog.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/1526685590.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cb6732424---ganopixoxup.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/jugetapow.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/30865120520.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///2021620912466360.pdfIn PDF document text
    • http://moawin.org/editorfiles/userfiles/files/98336358945.pdfIn PDF document text
    • http://houselandia.ru/files/ritavet.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ogu4i82a2pubg3t2hl1mpl9tsv/ruroke.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a18dbc8576---relobeme.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/41158048199.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/86842531533.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a271690463c---49234390439.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac6b6a7f9d---5478874007.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/08f71c20dae4b17bf58da3fed1b3d3c0/rabetaxadiretewunap.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2401ce633---zasuvofuvojaxobomamugupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=climat+tropicale+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_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 10540 bytes
SHA-256: 0493085b2a9adbfa84d3b974d1dc599a94be640c338b182b0078dda92ba71996
font_02_sfnt_off00012e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E43 20248 bytes
SHA-256: 25e4e998bcfa6e345faef1a6100ffa8ef5072cd3f778fc3e025fc54e94188353

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