Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe39c4d1afc0108…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 01:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 55ee6091955b3a9146583c68c85889ec SHA-1: 9b3b49f16d13ed7997fe4ab608a0cea68193ba81 SHA-256: bbe39c4d1afc01084c121aa6956ad3f223e8502692fee0da696cea003bf5ccbd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The embedded JavaScript stream and numerous external URIs, many pointing to potentially compromised or disposable hosting, suggest an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the interpretation that the document is designed to host a collection of links for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://immo-macedo.lu/userfiles/files/42348614841.pdf In PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/526840e2c8729e18e39c4dea27a66bde/90864338301.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/tanubitubomuralanarixo.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/puwiziwukegixojix.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/95248930811.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/8222861778.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/fiwexasakikajolilapuduzeg.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/wopomefakup.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/7048037058.pdfIn PDF document text
    • http://bulmarconsult.com/files/zofovidijofobofimorukor.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/kuliparinopunuwusilabixax.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/66119165571.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/265364c18d62ee63de69587716ab05b5/nojuvotos.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/82798277418.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/75415332403.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/81097883654.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/doboramoruzi.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364a2d767c5---58302511667.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/52125619543.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/somuzerixaroxagazikedo.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210902_212615.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/jifidakowesekiliki.pdfIn PDF document text
    • http://sro52.ru/uploads/files/36887779651.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/63545302442.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/20081263531.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/nanokikidagatinofuwiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=kali+linux+dual+boot+windows+10+uefiPDF 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_off0000d726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD726 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 17184 bytes
SHA-256: 8667229558dd4c453175c0ca5d0c9c1a107b580d85d0a70e28fb69cf7abdba6d
font_02_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 10840 bytes
SHA-256: 339df2e665f787a4df0f740dc00003775760015e494cfedec45b9bbb70c6549c

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