Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cddc919e95dce6…

MALICIOUS

PDF

88.5 KB Created: 2021-09-06 20:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4b82217d6c8d1aee14c7c99fb4af8c0a SHA-1: 873297a6751c39366484bf7f870ec5995bb28506 SHA-256: e9cddc919e95dce6fcfbb55ab2a5ea919a87676495c0e019d853c128fd4669f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate the PDF is a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a90c186e7---vixifefotoravuketovuvid.pdf In PDF document text
    • https://kham.vn/userfiles/file/nofirolirowimar.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/tedoxeramupirafenezofex.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/47d64a08f4c908930a5b7697c5b279b7/waselarusujobu.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/zereva.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/ab119406ea6218f61888c45ea8db07bd/41699088571.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/31279464571.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ef55a36de6e37b0ce366d0fcadbb42d4/dukowibuwujiwumiw.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/dewajonefu.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/59285745968.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/65866056394.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/005dfa94802abb874ee3f1c6e960c045/ruvojimirazadiwow.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/gakoginibexasebusabojis.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc510c30b---30675750237.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/zanixojojenininuwosolo.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/dejopanexuvumesunokojare.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/1ef09e1c83ce4be41ec5cd67f4a992c4/25316943446.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/cecf7003ba8877398cdc05efc305669d/92633494434.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98fee4b94a---raxomowododiradovarowo.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/60051143418.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/68320388448.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/4985826139.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611ccba80d5cb---32946587709.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/fojarajokakobabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=trigonometric+ratios+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 24808 bytes
SHA-256: e8233224086378a132680b1c0bc527cb6e6825cebec80440087ce1584fe87408
font_02_sfnt_off00011ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA3 1904 bytes
SHA-256: 294df0866adc76fa7d0992cfb5303aec1bb36a82a9c58fe7254cb1afec15e9d2
font_03_sfnt_off00012586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12586 10880 bytes
SHA-256: 0cb200e83f9a7ea55f4b60acc445a196d60210580b47d19d76995053c0084e38
font_04_sfnt_off00013e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6E 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426

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