Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2bc96d8ba38f3b…

MALICIOUS

PDF

75.3 KB Created: 2021-09-04 04:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 91891586084101847c5b7611cf8f679a SHA-1: d664b8f27eb849c03cad3a0e5ae422f54684cac1 SHA-256: db2bc96d8ba38f3ba22b2ff46a5253e5e5d5abf25e1e691738acdd2c727ed04f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://irlanc.ru/uplcv?utm_term=osce+physical+examination+pdf PDF link annotation
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/lamelisikipun.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/82825192820.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/dulojopofil.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/39489171616.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/zisajoxirewobitajukavevi.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/soxadalevozizojotego.pdfIn PDF document text
    • http://cartopack.com/Images/file/xedew.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095ba7d95ff7---zapojabezajonafuzazuran.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/4945768721.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/ef18a67301fabfb1525f1774ed1f5c97/vosirum.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/pirinusixexojezi.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2bca7eeafe5c56feefe7270c557b3e66/56348703617.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/tavika.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/voxirutexigizudinipudeb.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/takuboxelasex.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/gelasojuzedidalukuxabor.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/sinadaroxosavapiruzegud.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/50678099680.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/zafene.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/vurefajixuzaj.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/66331440772.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/16645713108.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zetudedenipovovewerolo.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/9858h7j5vuf680ngqr73muc9cg/dabolisawumozibiritakib.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/86960215838.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce91598ea4a---8383691723.pdfIn PDF document text
    • 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_off0000c2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FE 16732 bytes
SHA-256: 315384b515f798ac5463cb6e26867d5b3a98c8a24d8400b0620331f0002358ff
font_01_sfnt_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 11024 bytes
SHA-256: 66f72956eeb245f046d7911827d447d21f7838b7b018a5fb08e641ec7b5b0df5
font_02_sfnt_off00010785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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