PDF malware analysis — malicious · 1f5648449e675170

MALICIOUS

PDF

86.9 KB Created: 2021-08-09 11:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 06c250ff86aab8e4edd766dc1ae50a3d SHA-1: 2588dd81d907cb3f414baf604bfe2b5f8e4cf542 SHA-256: 1f5648449e67517052a422fa483250255810d7af76c2fd096cd3656889357cd0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to manipulate search engine rankings or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9904

Heuristics 5

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://sowa-architekci.pl/userfiles/files/76395194238.pdf In PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d564be056bc---10009164278.pdfIn PDF document text
- https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3053096860332ad16ac6efff1fcde8c6/wazozimorovi.pdfIn PDF document text
- https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/7e590cd06d55d52aef06462e2db67223/dikijo.pdfIn PDF document text
- https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e143417a3253c3ef42100c0a39df4013/81626590950.pdfIn PDF document text
- http://heyibnb.com/CKEdit/upload/files/deruzadinifo.pdfIn PDF document text
- http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c596dcbf40a---60238679345.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rb0vvqoh9ge9lrjiua07nag3e7/matubafovu.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/68a6467b9d99038865cba708c127e39d/69880980728.pdfIn PDF document text
- http://zerosquareonline.com/file/digibagol.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160779d8305cbf---demenijubogapebuxifanope.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/1c39f9e118b70b578fef0f3a3205501a/robisutakuwibumumok.pdfIn PDF document text
- https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/80e62c9a7536f9d3b5fa028b9200a600/12891594084.pdfIn PDF document text
- https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/e2a8770ed018458fc019484270844116/17300601973.pdfIn PDF document text
- http://ridendo.cz/files/file/36665482793.pdfIn PDF document text
- http://mstreatmentadvances.com/userfiles/files/juruzutixuroras.pdfIn PDF document text
- http://gdgom.com/upload/file/21070121472760451094fpzvz8tmuj.pdfIn PDF document text
- http://arohitourandtravels.com/userfiles/file/30942795450.pdfIn PDF document text
- http://clubmaniacr.com/campannas/file/15250353000.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c68de3478e---28521307035.pdfIn PDF document text
- https://agatanorek.com/files/file/44288509373.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160878a1403a53---niduvat.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16081b8f9ed5ba---sazezewebaduparivakeluxis.pdfIn PDF document text
- http://beachfirebrands.com/userfiles/file/94310983665.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/h0glh4hpakppte1vhl91pbht7u/zuginedulirigovovo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=direito+constitucional+esquematizado+pdfPDF link annotation
- http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/07df840106bfe6c3b2c8d007459ebd18/sedojedidusabukaxuzirese.pdfIn PDF document text
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8D7	11088 bytes
SHA-256: `f2a1d73ef3b800c9c6d97b72ded9839a7f704cab920d30bbc842eff69f3165d0`
`font_01_sfnt_off00010280.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10280	19508 bytes
SHA-256: `df6794c0b55e94f7acd9c732642ce8581309fe3ca17eeb1da2fc6e8b30c1c8e1`
`font_02_sfnt_off0001328e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1328E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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