Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10053e54e3a83cc…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 04:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 11746c5866922798da42d345e26d72a6 SHA-1: 8f191adce3a3d40b5462d20a7a75a44403ac86b3 SHA-256: f10053e54e3a83ccc9de91746ace4dcb3ecc9f14c1ec53e34aa9707b7ae843ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content or phish users. The presence of a PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to redirect users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://flomojapan.com/upload/files/piteradi.pdf In PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/96015920256.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/91848973310.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d417b16b4d---pabuborotorudevo.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/wadibidumasopas.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/lusovijosixigerofu.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/mexiluwu.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/19223149245.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/264974da8e13f1102d3520b67753bdbf/bejotazitusifezinowivom.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16132392214c25---9528603115.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/doxiderasuwudarofovojo.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/65937348363.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/55367312169.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/89911606792.pdfIn PDF document text
    • https://bor-diing.com/upload/files/kunujol.pdfIn PDF document text
    • http://ljsmelt.com/upload/files/xukamesimirejugogibogex.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0ff42904c8cff55bb870336612d56ba7/jegomosenine.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/96553250738.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/pukile.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/91726471960.pdfIn PDF document text
    • http://matras-devison.com/upload/file/68853217210.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/samenowelowoguwokenafu.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a832b9513d---pizafikedewepabenom.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16133269fad450---faxitatov.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/nokorij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=airbrush+pro+mod+apk+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC05 10828 bytes
SHA-256: 6f26c98324e3bb076b572dd8ed6cba9486fe280be26ce9b3a5324a0ada40ff16
font_02_sfnt_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 18504 bytes
SHA-256: a095ca2a3d921308cb1a67d11ad416a64299848609a7c4b5fa6bac7338ab77d8
font_03_sfnt_off0001221d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221D 16240 bytes
SHA-256: 109a1b2bc886faa4c66227ffcbf068e2af25414727a147583a6c6af58ee9b00c

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