Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9adf648d7a59f1…

MALICIOUS

PDF

78.7 KB Created: 2021-09-04 21:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ff626498e47d87d8c4bfd38727d60fcc SHA-1: 344e2ef7ba4c1f3d65a721c2b2fff59d879af0cf SHA-256: ea9adf648d7a59f13f99d0a84005fe9c21150f49dbbc0623cf9d798daf8f0e8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many hosted on compromised WordPress sites, which likely serve as downloaders for further malicious payloads. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612c5881e3238---dosufur.pdf In PDF document text
    • http://debeleven.net/UserFiles/File/fetovezujusobax.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607143b009d3e---15594715267.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0effa885bd---zukomefewatesadil.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/wesofu.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/72302394358.pdfIn PDF document text
    • http://shield-in.com/userfiles/files/ravojitudadi.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916d776e8e7---kifeli.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d1cfeabaef6---laguxesazobadowemileboxod.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/bodosutisag.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/kujakobawizixuparixozolep.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/nei0m7v39rd0ha69jl9kp5fa67/48177852239.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/koribinatulemeka.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/75ca5b0ffc2d178f77f53c34239e5a56/dofumarowukuzodovabasipil.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/levududuzej.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/nudinodasakofufus.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd87552e3b2---nagibujamikumaporabajo.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/69727203807.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/1b724ea7e69be4b465ff3f8f94f79524/nudotunakatuwakalak.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/752b57114b105dc19d188bbedf584259/77178559381.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5f7369211da9004c48029e1abc17b1c8/95206126820.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c95bc74570---bidaliboluvizefife.pdfIn PDF document text
    • https://areicon.com/images/file/27562027483.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e230f961---30398916115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dell+latitude+3500+spec+sheet+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_off0000cf20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF20 17184 bytes
SHA-256: 3e0a041fb58e9dd766f207bbbc2c9a50e5127da858acd9cb20c7501b08706e46
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 10924 bytes
SHA-256: 475c08c2f786704e2c8845b1e28b0014195d6a9fe86875f050944078b384097c
font_02_sfnt_off00011558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11558 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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