PDF malware analysis — malicious · a1c92c964423b49a

MALICIOUS

PDF

70.2 KB Created: 2021-09-25 08:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 2b44881a36370f295d58418978045a38 SHA-1: 871c234ce40954196596e1ed78dfb672efe14360 SHA-256: a1c92c964423b49ab6215c9e9138c1d7f8e98d0ce2170c14c53fad725d164490

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as 'https://crewmak.ru/uplcv?utm_term=five+nights+at+freddy%27s+security+breach+download+pc', suggest a lure to download potentially malicious content, disguised as game downloads. The PDF structure and embedded links are consistent with phishing or scam tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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
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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://crewmak.ru/uplcv?utm_term=five+nights+at+freddy%27s+security+breach+download+pc PDF link annotation
- https://blokhol.com/upload/files/97890427795.pdfIn PDF document text
- https://shindah.com/images/ckeditor_img/files/16554655553.pdfIn PDF document text
- http://www.bufolari.com/public/immagini/file/80072828170.pdfIn PDF document text
- http://shahnawazonline.com/uploads/files/lisoputitul.pdfIn PDF document text
- http://glendale.kopanramen.com/uploads/files/67270158670.pdfIn PDF document text
- http://fujiya-la.com/uploads/files/66999174008.pdfIn PDF document text
- https://blokhol.com/upload/files/35966474570.pdfIn PDF document text
- https://rajatotogroup1.com/contents/files/bumolorori.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161353ae496b29---pifanufenedawoze.pdfIn PDF document text
- https://ms02bet.net/contents/files/83351279058.pdfIn PDF document text
- http://problemconsulting.com/img/download/files/fimuraginux.pdfIn PDF document text
- https://amoslodge10.org/ckfinder/userfiles/files/siwej.pdfIn PDF document text
- https://bomberosdenavarra.com/userfiles_nexo/files/64921710764.pdfIn PDF document text
- http://twtqedu.com/userData/ebizro_board/file/79298435874.pdfIn PDF document text
- https://protrialse.eu/files/files/wurovovozakifobezi.pdfIn PDF document text
- http://findmecakes.com/userfiles/files/tusodijebasaboka.pdfIn PDF document text
- http://tamker.hu/userfiles/file/bonal.pdfIn PDF document text
- http://chandravanshi.com/userfiles/file/75861738342.pdfIn PDF document text
- https://discovercefalu.com/_data/images/file/xiwepawizopadigogulipipa.pdfIn PDF document text
- http://gemwishrs.com/ckfinder/stones/files/tibufamezu.pdfIn PDF document text
- http://associatedreclaimed.com/userfiles/files/jizazirikiw.pdfIn PDF document text
- http://campfirewtx.org/userfiles/file/kakofanever.pdfIn PDF document text
- https://hahapediatric.com/uploads/files/202109161548356243.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_off0000b04a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB04A	11416 bytes
SHA-256: `ac54258c2293243d501b5c42e00871506a3675718cdfd1a213b15b30cc5ef21d`
`font_01_sfnt_off0000cada.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCADA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e2ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2EC	15756 bytes
SHA-256: `48e0eb467a277abb1e4a9e34cbf3f1ca966890032216ed38022dfe3d8563aa77`

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