Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eaaaa1a39e1b119…

MALICIOUS

PDF

86.2 KB Created: 2021-09-05 12:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c017bae5ce00fe97d2766e126f89fa96 SHA-1: 00cd9467b188f95302f76f98bc6bf15d249cbbba SHA-256: 9eaaaa1a39e1b119e4519feffc30d637580ddaf6e3a4a11c51c88a13dc5ff395
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of external URIs and compromised CMS uploads points to a tactic of hosting malicious files on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://catamma.ru/uplcv?utm_term=pandemic+legacy+season+1+pdf PDF link annotation
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f64d1530d---28089649514.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/gesosaw.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/e6ee8c966fa0922c69e4b099e76ebf2b/13480957376.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/46cbb03a68881592646f572944cf2ffa/xunew.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611d155f2758c---labigutirapezixoxefedef.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/75412531701.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b02ac6eea7---tenosilukuzolokodigeb.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/titufekevoman.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/52e2961ebb52cdb440dfb71393d11eaf/80490718706.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fdc80873e---vuzavezeja.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071cbd9c34d9---vopaweti.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/67055187395.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a19dbacfc11---vivaniseboxuw.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/c13a7ad0f8819b90d04e6cc9ab578652/83463183821.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/ferurazarikono.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/83056099208.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/c9579643e72e4ac32b83f40fd35b2045/bemevixeminoliparoxixuj.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a78794e0844---kumomamuwopodirenug.pdfIn PDF document text
    • http://tyextractor.com/d/files/51556945845.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/xitivijekupizepadik.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/tadegoxasifo.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/visawomotuk.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/20218201019425089.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/99833489491.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/62272617041.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/3b88ba070caae8830031ff9258c99c56/53681767596.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1d5228d62---62011972772.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB18 10932 bytes
SHA-256: 11a04e0bc7809696522160bc6de8dd7ae26972bf2bc445bc7a356e90a28a360e
font_01_sfnt_off00010430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10430 18196 bytes
SHA-256: c9020dccf26c3965632809db9ea5eb66b6ef100d5490f7d84acc49c096c39603
font_02_sfnt_off00013301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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