PDF malware analysis — malicious · 95770adfb029db7c

MALICIOUS

PDF

84.6 KB Created: 2021-09-17 21:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: d6c3eeb96e3a47bdcc92c864567a93c1 SHA-1: 3d02ca1217624d0440f2df803df274a63b0d4211 SHA-256: 95770adfb029db7c1561d103b3424f644b5d5ffb25e9dfa89fe58ab0359e35a7

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The 'SE_MFA_LURE' heuristic suggests the document's content is intended to trick users into providing sensitive information, possibly related to multi-factor authentication. While no scripts were explicitly extracted, the nature of PDF link farms often involves JavaScript to facilitate redirection or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 6

MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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://allytemp.ru/uplcv?utm_term=how+to+hard+reset+moto+g5 PDF link annotation
- http://pc-driver.ru/userfiles/files/29595228615.pdfIn PDF document text
- http://standdominica.org/files/files/serilusavizep.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/a4a5vgqveind7d7u4qah6vev06/13849884095.pdfIn PDF document text
- http://mtkshop.com/images/uploads/file/jitelonobaxuluzalexumo.pdfIn PDF document text
- http://thewellmanteam.com/userfiles/files/vafewalefatinemegesenujal.pdfIn PDF document text
- http://kingsbrite.com/kingsbrite.com/userfiles/file/18826686948.pdfIn PDF document text
- http://www.plain-pied.com/editeur/ckfinder/userfiles/files/37513366574.pdfIn PDF document text
- http://blackhorsesc.pl/userfiles/file/vipikom.pdfIn PDF document text
- http://odpadykj.cz/UserFiles/File/timidevupodivegive.pdfIn PDF document text
- http://ducthanhtam.com/uploads/userfiles/file/timitupe.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141cf2980605---36322205338.pdfIn PDF document text
- http://oskarmak.com/userfiles/file/zesumojawi.pdfIn PDF document text
- https://xlspandoek.nl/userfiles/file/pafobamixipune.pdfIn PDF document text
- https://francoisdaulte.com/ckfinder/userfiles/files/10196693660.pdfIn PDF document text
- https://netron.pt/app/webroot/media/files/kubazajabimugutamasa.pdfIn PDF document text
- https://nvsrolko.org/ckfinder/userfiles/files/fojefepamisitosazesoxo.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/jadulerolirep.pdfIn PDF document text
- http://sofia-es.tokyo/yamituki-n/uploads/files/74066895494.pdfIn PDF document text
- http://087334211.kad.tw/kads/ckfinder/userfiles/files/83910943606.pdfIn PDF document text
- http://99hospitalitygroup.com/ckfinder/userfiles/files/27189971628.pdfIn PDF document text
- https://harmony.im/userfiles/file/levepogajanineg.pdfIn PDF document text
- http://merklink.nl/site/data/ws/files/6480556847.pdfIn PDF document text
- http://websteravelandscaping.com/editorData/file/tumapura.pdfIn PDF document text
- https://sjamsul-hidajat.id/ck_uploads/uploads/files/92976312348.pdfIn PDF document text
- http://s4l.vn/storage/ckfinder/files/xukazajigosajokuworoza.pdfIn PDF document text
- https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/859d470607fcabf9e85c6fcc13326399/vezasirudijexemofe.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_off0000e3ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3ED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fc04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC04	10664 bytes
SHA-256: `0e7c9f1c5554a2355a516f4be3b0624e0eeb83634ba8891d24fe456283cc49ce`
`font_02_sfnt_off00011455.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11455	18636 bytes
SHA-256: `b8b8ee2be4e3f3e185bb24c7715d3cc5d41c588df55707ee86731bb25d0e695f`

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