Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b48491f50d10b1a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 06:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 28e0e3c355696e4aae3c66c4e97bc6c9 SHA-1: 8bc05b53dff8eaec54a5697a061137a43cc3d6b9 SHA-256: 1b48491f50d10b1ad6a30116cf118005bc696107344de9f3e0123fa19e5ea4c2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=physics+2nd+paper+by+amir+hossain+pdf+free+download PDF link annotation
    • https://securitydm.net/slicice/file/zagofi.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/63889955019.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/21946486883.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/83343942969.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210909_212835.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/igofupowukanura.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/tevuturopoleg.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/xavalepavevumarolomizib.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/55298963772.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/gaxilezodukokokik.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210909_010446.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/57938797252.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/16871621333.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/61889045047.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161367a350ce63---rulin.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/12524790726.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/90368502923.pdfIn PDF document text
    • http://termocity.by/pics/files/79408884903.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2b082bfc7---gipipikuzodowidaguko.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16137c207a4e85---seserubul.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/sarotedewu.pdfIn PDF document text
    • https://remini.hu/userfiles/file/38319350989.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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 11248 bytes
SHA-256: 0803f4f0f8c9e19dabf0d179e60a73af20c117623a607ff9563a3d1551e0370a
font_01_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 22088 bytes
SHA-256: fe8d9b242b1452dc24c9ab6570c767ce9c75be8d82621625a1fef71604d0d43a
font_02_sfnt_off0001292e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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