Malicious PDF — malware analysis report

Static analysis result for SHA-256 08078ceeece95df5…

MALICIOUS

PDF

92.8 KB Created: 2021-09-08 00:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d9e3751fada51718dbcd48a661ece0f4 SHA-1: 3e2194cee29750d22f469d55d3415051be9e78c1 SHA-256: 08078ceeece95df500daa861cae1b57eab785af9ebf8c82ff0b98a7e8fc39f84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The 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 pointing to multiple compromised WordPress sites, suggesting it is used for phishing or malware distribution. The presence of numerous links to potentially malicious content on compromised domains indicates a high likelihood of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/9cb3b048069230b0bcd9c7ab10b8f523/bajumotebefoxokutulo.pdf In PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/c78ff4bf266b6dbf4829d6a3e028fc0b/95264676754.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160839440c9010---juvavujumobi.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/448dc9270504c1f78a93e1c4502a6d08/53287101295.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/mikegubedupiva.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021081317144144.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/zazafilifedagakajivazu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0af8e5da9---51150459613.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/kafigojurakisotemur.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c95afc56e9---10159581836.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/fijirojisamew.pdfIn PDF document text
    • http://chinalabware.es/d/files/jafabodevis.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/4649994191.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/bcgo9b5841fg0ncv51hs54c7jt/xamiletuzetobu.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/woserot.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/97332632299.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/61551430305.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/senovizopakonogesuwirudip.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/caec8d770eb79d5a16a0f5f4bccb818e/vagupilekedusibawave.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/gisajileladulisiweludop.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/4542404649.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/fibagamutenulum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=simatic+touch+panel+tp177b+manualPDF 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_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 10788 bytes
SHA-256: f33e34d08d0a4931ffe36088ea7c8b2fec5fcb106e2763e6f1ce9b8c43642b5b
font_01_sfnt_off00011af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF0 19356 bytes
SHA-256: 29d55cfd3a0a20e985df0cbd6ae2b03d5d74df8c2454511c76c9e9bd331daa73
font_02_sfnt_off00014d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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