PDF malware analysis — malicious · 6d6c922387b594e6

MALICIOUS

PDF

72.1 KB Created: 2021-09-25 19:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b2c529fcf299fe86ecdf3aa6b6c299bc SHA-1: 14ad0dd55413f1ddddc7ba5fa92bcb3f85726f22 SHA-256: 6d6c922387b594e6bcdd325cb53d5184bd1aaf9a5ee3dbb3f4d2ce5b43fefbe2

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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 https://archism.ru/uplcv?utm_term=how+do+i+install+cookies+on+my+phone PDF link annotation
- https://samoinstitute.mn/uploads/assets/file/85048534038.pdfIn PDF document text
- http://precisao.net/files/files/zapujusov.pdfIn PDF document text
- http://jshtextile.com/UserFiles/file///83920560950.pdfIn PDF document text
- http://micdelhi.in/userfiles/file/71081549833.pdfIn PDF document text
- https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/finufutiv.pdfIn PDF document text
- http://etpatatietpatata.com/userfiles/files/noxoxajitofafajeve.pdfIn PDF document text
- https://activepymes.com/pub/file/mupominunorajevalofug.pdfIn PDF document text
- http://ajitcoatings.com/uploads/72535598835.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/87341896981.pdfIn PDF document text
- http://alburigiott.it/userfiles/files/ginuguzawo.pdfIn PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/a3e1f6421e235aa234427b1dcb2b0939/tupabozimijukamoxewisoma.pdfIn PDF document text
- http://www.petersonassoc.com/emailimages/file/limezafuworuboxijot.pdfIn PDF document text
- http://snabsz.ru/ckfinder/userfiles/files/fewevezakotivelabizop.pdfIn PDF document text
- http://evolutionchonburi.com/userfiles/files/jotewaratuj.pdfIn PDF document text
- https://www.hmgfinance.com/ckfinder/userfiles/files/jalenepadijemoli.pdfIn PDF document text
- http://ngoinvest.com/uploads/ckfinder/files/39280962253.pdfIn PDF document text
- http://mg001.cn/upload_fck/file/2021-9-25/20210925181542820274.pdfIn PDF document text
- http://danangsculpture.com/uploads/image/files/mupajixozijijomomasokuta.pdfIn PDF document text
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/k6hpms9hef8j74uk6gjao8htd7/jimosivarisuxep.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///levekodolojit.pdfIn PDF document text
- http://olsztyntransportmedyczny.pl/userfiles/file/jazikuzawizavatir.pdfIn PDF document text
- http://www.tramag.pl/upload/file/todolopata.pdfIn PDF document text
- http://myblindz.com/fck_user_files/file/82468095742.pdfIn PDF document text
- http://ozona.pt/js/fckeditor/editor/filemanager/connectors/wysiwygfiles/file/75561638508.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_off0000b57e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB57E	10960 bytes
SHA-256: `a9a9e351cfc93ecdf0ce7238e7c2c5d17f422ea03f459fcdaabae1b97d9a9b99`
`font_01_sfnt_off0000cebd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEBD	17216 bytes
SHA-256: `a3b70dec1192ac41b6dcf6a7088110b463d5d8997f1f669a9d74faa450cf712a`
`font_02_sfnt_off0000fa5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA5C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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