Malicious PDF — malware analysis report

Static analysis result for SHA-256 6414f080cc6587d2…

MALICIOUS

PDF

81.4 KB Created: 2021-09-13 18:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 727e5213957103ab1f8e5d5616958263 SHA-1: 0c985bb1635489435c650998be6b17afe69d11d1 SHA-256: 6414f080cc6587d2cb13a835227eb24345dd154c8d45e517f6fc68bcbd4c9764
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of a link with 'wps+password+cracker' in the UTM parameters strongly suggests a lure to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=wps+password+cracker
    • https://machnhaduong.com/images/uploads/files/19839911658.pdf
    • http://pinzimoniofiumicino.eu/userfiles/files/99473557915.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7a03ad53e2fb09744a6eb113c4e19e1e/94399883809.pdf
    • http://air-con.ru/upload/files/tikemedejedim.pdf
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/farutapaxowulifotolexi.pdf
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210906_3A3DBEF0B631BC6E.pdf
    • https://thaiahpa.com/flash/files/bemes.pdf
    • http://sanarina.de/ckfinder/userfiles/files/6566067776.pdf
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/36177799126.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecb5ab0ffc---36478794936.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea4c301ed6.pdf
    • http://cayxaotamphan.net/userfiles/image/file/61312611425.pdf
    • http://zae.me/datafiles/file/suvuvoxefemevozanigofar.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c8d22fdb6---webusowunubapowerexavo.pdf
    • http://onlinemidias.com/ckfinder/userfiles/files/92239684581.pdf
    • http://choragwica.pl/userfiles/file/50155513671.pdf
    • http://dgjinhak.kr/DATA/upload/files/202109020720004877.pdf
    • http://kutscher-customs.de/gfx/userfiles/files/rupimox.pdf
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/bexapesilipifalewof.pdf
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/maluzibad.pdf
    • http://metafelix.it/userfiles/files/12861924778.pdf
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/6912903572.pdf
    • https://kingdom.vn/userfiles/file/13727188205.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/55bdccfa8c2011af21be6c5b9db21568/2190148500.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 16792 bytes
font_01_sfnt_off0000efdc.bin
7fdd417b1c4a1bdbd537b56dbf1898972b9c02575ab74ba390b8fde319f5fb8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 10336 bytes
font_02_sfnt_off00010763.bin
60136953e46a4eb708b8097c18d83611e2c8a8f6104c0fe8af3772865f902df5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 18028 bytes