Malicious PDF — malware analysis report

Static analysis result for SHA-256 71375fe1fb16746a…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 11:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6cc2cb32a284984b613383fff284803e SHA-1: 81907b90580fd86889f74677128d75aec32171e2 SHA-256: 71375fe1fb16746a8a642ef5db8634ef6c64e3161bd21d6faba56283b2255818
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://motoquadro.de/userfiles/file/dajasosusasewezilipopoja.pdf In PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/92000995790.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210904_042043.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210911053751.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/falitowoxuwoza.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613334e266af8---25354551072.pdfIn PDF document text
    • http://ranch.pl/files/file/jizekuwasemivaboxoxediju.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/70033720998.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/fizemu.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/46704879956.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/15393889911.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db05929f9f---tagizexuji.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/25621252081.pdfIn PDF document text
    • http://granitabrasive.com/editor_up/89193993812.pdfIn PDF document text
    • http://hepiran.com/cache/fck_files/file/13362007466.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/jaronuzotadabovujekewedi.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/fodiveludumo.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161397b1d5e4bd---93344013743.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/lowima.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/wemisakotutumud.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/voperibelifagedigusir.pdfIn PDF document text
    • http://kbinteriery.cz/userfiles/file/puzadawovezil.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/31368987511.pdfIn PDF document text
    • http://hodori247.com/uploads/files/relafoxemitozafisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dragon+ball+legends+modded+apkPDF 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_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 18500 bytes
SHA-256: 3816e4994e5df0abdd36a26037c1dd218d65f673968de6cc37bbd96689d0b8a1
font_01_sfnt_off00010a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6E 10780 bytes
SHA-256: 287a94444f5829eb5a9cad7fa1fa7872ff4fe92eaab2b675d4172b0137f072aa
font_02_sfnt_off000122c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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