Malicious PDF — malware analysis report

Static analysis result for SHA-256 060a30de34d98833…

MALICIOUS

PDF

88.3 KB Created: 2021-09-06 17:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 73431560490f3c63650fcf52340e19e5 SHA-1: 01cd87487e3bf9f0ab58dc89b94d3ad2cdd2ad24 SHA-256: 060a30de34d9883334e73254c123db2a9aefb4c14653b4021c7ca93fab29e515
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1553.004 Mark-of-the-Web Bypass

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_SECURITY_BYPASS' indicates the document explicitly instructs the user to disable antivirus software, a strong indicator of malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the security bypass instruction strongly suggest the document is designed to facilitate the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 https://louvre.lv/res/wysiwyg/file/lulabixedugijimikeloreg.pdf In PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/e5e916b7248624d137795cd7ff8fbaf9/zusizutowufijivevu.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/giziwixawerisunibekoruw.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/joxazubinudufesiwiguz.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/sororabilofavufigomefad.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/fabf5c00de0f0f442109e1f76d67cf19/37618395035.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/536d790597244bfd619add8effe2a139/sosekinujijudupibunevufe.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/tiperij.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/xoruwudawi.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210529113649.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/3a74f8dbebe93b137ce807885ee92e36/32711907908.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/07c490361c4e14f98985763a1a5ad09f/rorofiloruje.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/6619314856.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/4e769f63c53336ff9eece59ede166502/87376462282.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/59347692298.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1610afd0b6f6f2---86861372721.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b91e62a7215---bifaxijelonojozunefizolus.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/zavetetirikanupirekijenag.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/8286113467.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/63482973875.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc9d30195f---fodawefujibid.pdfIn PDF document text
    • http://rayanchem.com/d/files/40006717894.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8dd7e1fb---rejosuwabeb.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/zodetez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ubiquiti+networks+enterprise+ap+unifi+manualPDF 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_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 11092 bytes
SHA-256: 2c28eeb86b8af26d89be2f8cfe9567e6fd5487b7ec7363a31323bce292009009
font_01_sfnt_off000105e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 20756 bytes
SHA-256: 8c7bec2726ba7372cb2a1038d34215c716d2af5e7dbdaa695500d64870b10e57
font_02_sfnt_off00013ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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