Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d6a3d4779bc22a…

MALICIOUS

PDF

75.9 KB Created: 2021-09-10 03:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b0642755dbf0c2c2b6def359f64aa278 SHA-1: 352a619067bfbf869056d340c066d31de2f5a43f SHA-256: 42d6a3d4779bc22a470ee3b2f6d6ffbb39a01658eda001e95d4f613cde65a609
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm containing numerous URLs, many hosted on potentially disposable domains or compromised CMS uploads, suggesting an attempt to direct users to malicious sites. The document body was unreadable, but the presence of multiple external URIs and link farm indicators strongly points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.recko.ru/ckfinder/userfiles/files/kenapisepibolilarojile.pdf In PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/gasurejivinemunixidu.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/zutiwuramajavatufojajur.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/19186542580.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/gubafufugufixap.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/34680503624.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138aec99e3ec---89618616900.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/favakamukimizavakixi.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/66266325992.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210906_D699B1A932AC9B29.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/75845399453.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a4feb94ce3913827274504eb412f40c0/83012783636.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///vogebafi.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/sawowas.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/tudajewafamitobaka.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/xabewedarepetizanobenuda.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/bemedo.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109081149259738.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/dakapojumulovon.pdfIn PDF document text
    • http://www.puhito.hu/uploads/24921279087.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/9b562378fbf8ad2cfd55051346ac3a99/98999314754.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/sorivowapuneme.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/56458201384.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/69661951425.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/diresutelobepirob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=cricket+mod+apk+downloadPDF 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_off0000c46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46C 10716 bytes
SHA-256: 6a806c665bf0133adddf3fa757b384337d47c0dd143a13ada24e1ce7c6ffdd0b
font_01_sfnt_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 17432 bytes
SHA-256: 5f9257dcb915c8a7cd51483d704ca92ba619fe22e52137b5a13dd4656547d57f
font_02_sfnt_off00010a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.