Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c6f93d7de71682…

MALICIOUS

PDF

84.8 KB Created: 2021-07-14 06:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4d054402b12b6daa3a613f574174b1ec SHA-1: e0659e0a973278609fc3c0f3885b18f340367d51 SHA-256: 11c6f93d7de71682a9313fe4227bddbd232edee4448ed6b2becf1a8d5493a1d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for malware distribution. The presence of a URL containing 'hp+1320+printer+driver+for+windows+10+64+bit+free+download' indicates a lure to trick users into downloading a malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://talleresjpg.es/img/file/ronoro.pdf In PDF document text
    • http://botosani.ro/img/uploads/file/44159908804.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/bma5atpm3tf49hmpqa6rlao0lvk3t0b3/44620778630.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/49789051751.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/23592e98d84a29307516b8ce019e14be/tutek.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/s6vb2p18166pd46iibht3g74qt/maguboxikebegux.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/moresiluxixolo.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160844369cf747---97515838092.pdfIn PDF document text
    • http://zlato-invest.cz/upload/files/rutevixemujavodewinanelam.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/fuxatotakafakeba.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/h8iuvu6m0h0snv1tphmi2jeb51/derawewajuv.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/sunaten.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/15a9c7ba2911d0b93a65d5bde8945c5c/17557791100.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/9cpn9m3opvskivegi1uein2qa0/47559388195.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/vcmu43a5ee8gdqegp0qsmpcmif/navibogobasemoz.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3de4ac2a8---zozikufawusakeriwar.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/f176bd486e986dad113d4a5b001b2d55/23456674044.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/18834634159.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/57ca73215179507179b9a34a14f9e9b8/21586304849.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/vemezaj.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/35732399580.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160e0efa8b7faa---notunevutidewoziko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=hp+1320+printer+driver+for+windows+10+64+bit+free+downloadPDF 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_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 11488 bytes
SHA-256: 5e5af1c0cb57ed0e7ceb79affd79131c0821f54ffae82f9cc1b5089d8c1a080c
font_01_sfnt_off00010086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 17880 bytes
SHA-256: b2b5ec1699e42c116074ad38f63afbed743c76d0b7e3ae4f71613edef50ee5b9
font_02_sfnt_off00012db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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