Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff36dd85f85df2f…

MALICIOUS

PDF

88.7 KB Created: 2021-08-14 23:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 188a32d3ec2a79878c158f4e0d27197b SHA-1: fa4749421e1f763b477afa5a7acd1d2cc1497f8f SHA-256: dff36dd85f85df2f7e1e018e358b6f052a8fecb73e7e519cae920db60dd72604
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were extracted, the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://naturallabs.fr/userfiles/file/redefulimevadene.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087560eea25c---sogenufigupetipigaxo.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/161133483a8cc7---50666834867.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609415274d420---40536707854.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6807d13b38---muliwitomedebuturevij.pdfIn PDF document text
    • https://ckmandarin.com/uploads/93524733355.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/48844944654.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/zofutodivowu.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/dafejibanadeziboded.pdfIn PDF document text
    • http://gabortech.com/admin/file/94518961994.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/13663342199.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd6ca602c4---51630109854.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/9839545657.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/c8ec8ee8999c4a1deca9017df7e13df0/bowunenasavazobejeroruvi.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/eidtcq21a2dpihmlrrg4g1i5eg/53192808121.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/vusowuseredatesuduzij.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/86717008421.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e4dd2fe3c---nodunuxad.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5104d2426---55206693314.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/58241447282.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/razipidabujabaraxapeda.pdfIn PDF document text
    • http://tunecharts.com/userfiles//file/muvafurisifuxezakokenuzo.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbff37fb3f---sowaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=diy+murphy+bed+free+plansPDF 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_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 10900 bytes
SHA-256: 6283007d94538ee54c0af15d415b399c4573f155c2a2a647b4a19b07dcce30c9
font_01_sfnt_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 17256 bytes
SHA-256: 654ca0d4c48f078af1c5c748fdf5e1d881b34f04686168da800addfc3d404e21
font_02_sfnt_off00013c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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