PDF malware analysis — malicious · 1f6da0e8bfecf615

MALICIOUS

PDF

82.5 KB Created: 2021-08-20 14:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 340ed9e26afb3f02e2c3f465b99e43d6 SHA-1: 1e915d2d40154bd8d028d76a3298d2a52768e93e SHA-256: 1f6da0e8bfecf615a96d6592594e711084497475bd83d1a2a5cf212fed547923

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160eff78c46ee5---ledupogidotiwit.pdf In PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4990431561---4365501179.pdfIn PDF document text
- http://hanilkwanla.com/uploads/files/puvazirokuwipebugig.pdfIn PDF document text
- https://emmaushuis.org/pages/73525640030.pdfIn PDF document text
- http://sanmorales.es/userfiles/files/degixurefatoz.pdfIn PDF document text
- https://almondzwealth.com/administrator/imagetemp/file/14908374554.pdfIn PDF document text
- https://roc.mn/uploads/files/35872461981.pdfIn PDF document text
- http://dotacjedlaoze.pl/userfiles/file/80134362251.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b31bab35---91715893514.pdfIn PDF document text
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b96e6601b---femuximuzelomivaza.pdfIn PDF document text
- https://watfordfairtrade.org/app/webroot/img/files/61048849493.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/2np7sijtotvvm9j45b4rm85mrd/kilovisad.pdfIn PDF document text
- http://shiinamotors.com/js/upload/files/36437607057.pdfIn PDF document text
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/173f05f53e27214555d19dc88262f01e/6413625896.pdfIn PDF document text
- http://www.ujepites.hu/userfiles/files/36403201744.pdfIn PDF document text
- http://tuzvedo.hu/elemek/file/gotisadolujosikijelef.pdfIn PDF document text
- http://yachtandgulet.com/userfiles/file/29497430563.pdfIn PDF document text
- http://eau-msu.ru/ckfinder/userfiles/files/18222967698.pdfIn PDF document text
- http://hasici-pristroje-eshop.cz/files/file/23866240805.pdfIn PDF document text
- http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e42e2326dc1---3701718628.pdfIn PDF document text
- http://ahchala.com/img/file/vamexuzavelojadela.pdfIn PDF document text
- https://spheresignal.com/app/webroot/userfiles/files/gexetejolisonex.pdfIn PDF document text
- https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/deqsbqm0fhh0dp5872etho93l6/37345762778.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=simultaneous+equations+one+linear+one+quadratic+worksheet+pdfPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d8f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8F6	18768 bytes
SHA-256: `ebadd0af802cc58ecfe2512f1e3aed9f58a6c8039f6b97fa86d435047b844f24`
`font_01_sfnt_off0001090a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1090A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012121.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12121	11384 bytes
SHA-256: `13852652a2609a37dacd8c151c33a1db0324c14dd820ed890c3aaf5539a0d120`

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