Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e22ce14fed31d30…

MALICIOUS

PDF

73.3 KB Created: 2021-09-17 17:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98129e4e8f8c9b1d62d4707c71b6b2a1 SHA-1: 5bab8a97ef8148d4a2204f06964405e7affa11bd SHA-256: 0e22ce14fed31d30b6428751a7f5db4b39ea8544573d311f238e542f08942f60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm hosted on compromised WordPress sites, suggesting an attempt to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous links to PDF files on potentially compromised domains points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135837130054---rolivitiguzigo.pdf In PDF document text
    • http://safarang.com/basefile/files/jijatuz.pdfIn PDF document text
    • https://ckmandarin.com/uploads/tanoretob.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/37897284460.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/80125921206.pdfIn PDF document text
    • http://kisito.com/userfiles/file/33959006730.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/40892795830.pdfIn PDF document text
    • https://red-adlay.com/upload/files/mezuwafaviturosajiza.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/selutekigunewapakofaj.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/pepadogitipivexibisomerir.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/25872624729.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/tusepeviterarerenubenokip.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134767f3e1cf---4836579726.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/nabumevikekukoxag.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/18772027262.pdfIn PDF document text
    • http://hacsbathtarntaran.org/~/userfiles/file/17961394925.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/en82rp37o13d5sfvetf5dbs3sg/dotibuv.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/jijenisibak.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/77816329283.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/80203309706.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc89754f42---56645898320.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/45215338267.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/walivibosakejusorakasit.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/rolimuwadijasevomew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tamilrockers+2021+tamil+moviePDF 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_off0000ba0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0E 17404 bytes
SHA-256: 27192e06630fda99c217087cd43c7fd4786786c8439cafad10ee11b351349442
font_01_sfnt_off0000e6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 10704 bytes
SHA-256: 42993d7df4ed84d9ab62cb50db2a64d8032e69ad9ee87ba081e295fc56153e13

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