PDF malware analysis — malicious · 094acc0852883159

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 22:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 114a29bd5315b582dacc84a8e58837d2 SHA-1: e712a4ed25ad636d3f3976ddc2a22eb901305ced SHA-256: 094acc08528831593644aec7ef819b7fe6808f8fd6d593c4f790f6f18ce57adb

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with critical detections indicating phishing and trojan characteristics. Embedded JavaScript streams are present, suggesting the PDF is designed to execute malicious code. The presence of numerous external links, many pointing to PDF files on various domains, indicates a likely attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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://treasurehunterdetectors.com/ckfinder/userfiles/files/tenogepete.pdf In PDF document text
- https://digireg.nu/upload/videvubu.pdfIn PDF document text
- https://olterus.com/contents/files/titazuzelosozoximinabimen.pdfIn PDF document text
- http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/33457300544.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/1eee6350e5a31bfb7238a92a91ca62f0/69635762001.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161334412b5c12---mogefelidiwiximusozeselug.pdfIn PDF document text
- http://www.siphonicflowmandiri.com/upload/files/79717979678.pdfIn PDF document text
- http://tjsyjdq.com/v15/Upload/file/2021911130286226.pdfIn PDF document text
- http://contextuae.com/resimler/files/26777918362.pdfIn PDF document text
- http://abwmercury.com/uploads/files/99740220935.pdfIn PDF document text
- http://club-integra.ru/userfiles/file/62364520726.pdfIn PDF document text
- https://noithathoaphat11.com/upload/files/703716180.pdfIn PDF document text
- https://lesrimaudieres.com/images/uploads/file/memolivibox.pdfIn PDF document text
- http://kfoodntea.com/dataroom/file/vimudobudipebov.pdfIn PDF document text
- http://www.gpkoaee.ru/ckfinder/userfiles/files/lukijomobetexubasabozun.pdfIn PDF document text
- http://husplaza.hu/editor_up/wunodorisefofixoxotuziz.pdfIn PDF document text
- http://jarosi.hu/files/file/62261339505.pdfIn PDF document text
- https://aldwalia.com/userfiles/files/nalapelomasudobixafuvipev.pdfIn PDF document text
- http://sportingfoundation.com/uploads/file/97151157479.pdfIn PDF document text
- http://lica.plovdivweek.com/js/ckfinder/userfiles/files/31479407075.pdfIn PDF document text
- https://ecoquimica.cl/dinamicos/uploads/file/36947310655.pdfIn PDF document text
- http://jlsxjy.com/right/UploadFile/file///2021091202105373499.pdfIn PDF document text
- https://pakistanchristiancongress.org/userfiles/file/91512386241.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=watch+mike+tyson+free+onlinePDF 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_off0000db44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB44	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f356.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF356	17984 bytes
SHA-256: `0a8d90cabb4260b046ef9bb9e734dfbc4a34d9fc22e0c7dd947a7ae5c56933e1`
`font_02_sfnt_off000121f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121F9	10800 bytes
SHA-256: `fa56097fd5e938a0248dc2de1f1442269df2b71975661f6c8c787efbeafe424e`

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