Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6b3cc5f7ab2401…

MALICIOUS

PDF

90.5 KB Created: 2021-07-26 15:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 08430ed43d237388d923c2c78ee0aba2 SHA-1: 295803bdc56fd8d9221cea834fc2c762ba61db91 SHA-256: 9a6b3cc5f7ab2401ce58c027bcbc3cdc40da338674060830263efdd91bd9447e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://magnachip.cn/userfiles/file/20210510091336.pdf In PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/34154fbe125df36f72262320d200ccc9/93191237385.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/mobujagazoxusawix.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/c4d2c6336ca3f30402e617588950f418/56383709661.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/39033043027.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/67169425042.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/66533196654.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2a330c0e8---56116551783.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/373b5803195652d90496617479da0e2f/xegasoperatoxipo.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/78002439f787ec1eadc6ef711113268f/xegure.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5f354199a---sigumuwalevapono.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/35783743541.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d4ff5edd8bfe5bb498663b634c6cce8e/kimewinevokaza.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/nuzunapiketejubaze.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/iqi3a57m7fmp04jhmcls6dufb0/mebafera.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de9bafea6a1---ruvisisakavipa.pdfIn PDF document text
    • http://www.emailposte.com/pictures/dazanabimotovaliti.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/47219101248.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bffd3c81063---fozasifizadugotudobojuj.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/pinebu.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/47991864672.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429094923101.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/faf1d9ab18899d5629c09ad848786960/37859113393.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/tesilu.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7qalu5npreqjqcimegl2fsosbk/90409839762.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16075358c022fc---mevomutuketekebutujotumug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ap+seminar+tmp+templatePDF 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_off0000fb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AF 10272 bytes
SHA-256: b56c75a414a87c8811128bbdc3a27107dd3687d90a1b8fbb4ca056c41051fb2a
font_02_sfnt_off00012ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC1 18016 bytes
SHA-256: 38be6c232f91019d59889902beb7d1ae38e4c404362152f0bc93d9bae5519c02

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